## Effective/New Gear Ratios

Stock Tire Size :
/ R
(Examples: 285/75R16 or 33X12.50R15)

New Tire Size :
/ R
(Examples: 285/75R16 or 33X12.50R15)

Stock Gear Ratio : : 1

Effective Gear Ratio : : 1

New Gear Ratio Needed : : 1

Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. Also calculated is the new gearing you would need in order to return back to your original gear ratio when going to a bigger or smaller tire.

Just input your stock and new tires sizes along with your original gear ratio. Click "Calculate Gear Ratios" to find your effective gear ratio and the equivalent gear ratio needed to keep your stock gearing.

## Gear Ratio Tire Size Conversion Charts by Wheel Size

• 13"
• 14"
• 15"
• 16"
• 16.5"
• 17"
• 18"
• 19"
• 20"
• 21"
• 22"
• 23"
• 24"
• 26"
• 28"
• 30"

### Gear Ratio Tire Size Conversion Chart for 13" Wheels

#### 21" Tire Diameter

185/60R13 = 21.7x7.3R13
215/50R13 = 21.5X8.5R13
225/45R13 = 21x8.9R13
225/50R13 = 21.9x8.9R13
255/40R13 = 21x10R13

#### 22" Tire Diameter

155/80R13 = 22.8x6.1R13
175/70R13 = 22.6x6.9R13
205/60R13 = 22.7x8.1R13
22X8R13

#### 23" Tire Diameter

165/80R13 = 23.4X6.5R13
185/70R13 = 23.2x7.3R13

#### 24" Tire Diameter

175/80R13 = 24x6.9R13
185/80R13 = 24.7x7.3R13
24.5X8R13
24.5X9R13

### Gear Ratio Tire Size Conversion Chart for 14" Wheels

#### 19" Tire Diameter

105/70R14 = 19.8X4.1R14

#### 20" Tire Diameter

115/70R14 = 20.3X4.5R14
125/70R14 = 20.9X4.9R14

#### 22" Tire Diameter

165/65R14 = 22.4x6.5R14
185/55R14 = 22x7.3R14
185/60R14 = 22.7x7.3R14
195/55R14 = 22.4x7.7R14
205/50R14 = 22.1x8.1R14
205/55R14 = 22.9x8.1R14
225/50R14 = 22.9x8.9R14

#### 23" Tire Diameter

175/65R14 = 23x6.9R14
175/70R14 = 23.6x6.9R14
185/65R14 = 23.5x7.3R14
195/60R14 = 23.2x7.7R14
205/60R14 = 23.7x8.1R14

#### 24" Tire Diameter

185/70R14 = 24.2x7.3R14
185/75R14 = 24.9X7.3R14
195/65R14 = 24x7.7R14
195/70R14 = 24.7x7.7R14
215/60R14 = 24.2x8.5R14
225/60R14 = 24.6x8.9R14

#### 25" Tire Diameter

195/75R14 = 25.5x7.7R14
205/70R14 = 25.3x8.1R14
215/70R14 = 25.9x8.5R14
235/60R14 = 25.1x9.3R14
245/60R14 = 25.6x9.7R14

#### 26" Tire Diameter

205/75R14 = 26.1x8.1R14
215/75R14 = 26.7x8.5R14
215/75R14 = 26.7x8.5R14
225/70R14 = 26.4x8.9R14
26X8.5R14

### Gear Ratio Tire Size Conversion Chart for 15" Wheels

#### 20" Tire Diameter

105/70R15 = 20.8X4.1R15

#### 21" Tire Diameter

115/70R15 = 21.3X4.5R15
125/70R15 = 21.9X4.9R15
195/45R15 = 21.9x7.7R15

#### 22" Tire Diameter

125/80R15 = 22.9X4.9R15
145/65R15 = 22.4x5.7R15
155/60R15 = 22.3x6.1R15
165/60R15 = 22.8x6.5R15
175/55R15 = 22.6x6.9R15
195/50R15 = 22.7x7.7R15
22X8R15
22.5X4.5R15
245/40R15 = 22.7X9.6R15
275/35R15 = 22.6x10.8R15

#### 23" Tire Diameter

135/80R15 = 23.5X5.3R15
175/60R15 = 23.3x6.9R15
185/55R15 = 23x7.3R15
185/60R15 = 23.7x7.3R15
195/55R15 = 23.4x7.7R15
205/50R15 = 23.1x8.1R15
205/55R15 = 23.9x8.1R15
225/45R15 = 23x8.9R15
225/50R15 = 23.9x8.9R15

#### 24" Tire Diameter

135/90R15 = 24.6X5.3R15
155/80R15 = 24.8X6.1R15
175/65R15 = 24x6.9R15
185/65R15 = 24.5x7.3R15
195/60R15 = 24.2x7.7R15
205/60R15 = 24.7x8.1R15
225/55R15 = 24.7x8.9R15
235/50R15 = 24.3x9.3R15
24X4.5R15
24X5R15
24.5X8R15
245/50R15 = 24.6x9.7R15
345/35R15 = 24.5x13.6R15

#### 25" Tire Diameter

165/80R15 = 25.4X6.5R15
185/70R15 = 25.2x7.3R15
195/65R15 = 25x7.7R15
195/70R15 = 25.7x7.7R15
205/65R15 = 25.5x8.1R15
215/60R15 = 25.2x8.5R15
225/60R15 = 25.6x8.9R15
265/50R15 = 25.4X10.4R15
275/50R15 = 25.8x10.8R15

#### 26" Tire Diameter

205/70R15 = 26.3x8.1R15
215/65R15 = 26x8.5R15
215/70R15 = 26.9x8.5R15
235/60R15 = 26.1x9.3R15
245/60R15 = 26.6x9.7R15
26X10R15
26X10.5R15
26X11.5R15
26X6R15
26X7.5R15
26X8R15
26X8.5R15
295/50R15 = 26.6x11.6R15

#### 27" Tire Diameter

205/75R15 = 27.1x8.1R15
215/75R15 = 27.7x8.5R15
225/70R15 = 27.4x8.9R15
255/60R15 = 27x10R15
27X10.5R15
27X9.5R15
27.5X4.5R15
295/55R15 = 27.8X11.6R15
325/50R15 = 27.8x12.8R15

#### 28" Tire Diameter

225/75R15 = 28.3x8.9R15
235/70R15 = 28x9.3R15
235/75R15 = 28.9x9.3R15
245/70R15 = 28.5X9.6R15
255/65R15 = 28.1x10R15
275/60R15 = 28x10.8R15
28X10.5R15
28X11.5R15
28X12.5R15
28X13.5R15
28X4.5R15
28X7.5R15
28X9R15

#### 29" Tire Diameter

215/85R15 = 29.4X8.5R15
255/70R15 = 29.1x10R15
265/70R15 = 29.6x10.4R15
29X10.5R15
29X11.5R15
29X12.5R15
29X15.5R15
29X18R15
29X18.5R15
29X4.5R15
29X8.5R15
29.5X11.5R15
29.5X13.5R15
29.5X9R15
315/60R15 = 29.9x12.4R15

#### 30" Tire Diameter

255/75R15 = 30.1x10R15
265/75R15 = 30.6x10.4R15
295/65R15 = 30.1x11.6R15
30X10.5R15
30X11.5R15
30X12.5R15
30X13.5R15
30X7R15
30X9R15
30X9.5R15

34X10.5R15
34X12.5R15
34X9.5R15

36X12.5R15
36X13.5R15
36X14.5R15

37X12.5R15
37X13R15
37X13.5R15
37X14R15
37X14.5R15

39X13.5R15
39.5X13.5R15
39.5X15R15
39.5X18R15

40X16R15

42X14R15
42X15R15
42.5X13.5R15

44X18.5R15
44X19.5R15
44X21R15

47X17R15

### Gear Ratio Tire Size Conversion Chart for 16" Wheels

#### 22" Tire Diameter

125/70R16 = 22.9X4.9R16
175/50R16 = 22.9x6.9R16
195/40R16 = 22.1x7.7R16
195/45R16 = 22.9x7.7R16
205/40R16 = 22.5x8.1R16
215/35R16 = 22x8.5R16
215/40R16 = 22.8x8.5R16

#### 23" Tire Diameter

125/80R16 = 23.9X4.9R16
135/70R16 = 23.4X5.3R16
175/55R16 = 23.6x6.9R16
185/50R16 = 23.3X7.3R16
195/50R16 = 23.7x7.7R16
205/45R16 = 23.3x8.1R16
215/45R16 = 23.6x8.5R16

#### 24" Tire Diameter

125/85R16 = 24.4X4.9R16
125/90R16 = 24.9X4.9R16
135/80R16 = 24.5X5.3R16
175/60R16 = 24.3x6.9R16
185/55R16 = 24x7.3R16
195/55R16 = 24.4x7.7R16
205/50R16 = 24.1x8.1R16
205/55R16 = 24.9x8.1R16
215/50R16 = 24.5X8.5R16
225/45R16 = 24x8.9R16
225/50R16 = 24.9x8.9R16
245/45R16 = 24.7x9.7R16

#### 25" Tire Diameter

135/90R16 = 25.6X5.3R16
145/80R16 = 25.1X5.7R16
195/60R16 = 25.2x7.7R16
205/60R16 = 25.7x8.1R16
215/55R16 = 25.3x8.5R16
225/55R16 = 25.7x8.9R16
245/50R16 = 25.6x9.7R16
265/45R16 = 25.4X10.4R16
275/45R16 = 25.7x10.8R16
315/40R16 = 25.9X12.4R16

#### 26" Tire Diameter

195/65R16 = 26X7.7R16
205/65R16 = 26.5x8.1R16
215/60R16 = 26.2x8.5R16
225/60R16 = 26.6x8.9R16
235/55R16 = 26.2x9.3R16
255/50R16 = 26x10R16
26X11.5R16

#### 27" Tire Diameter

155/90R16 = 27X6.1R16
195/75R16 = 27.5x7.7R16
205/70R16 = 27.3x8.1R16
215/65R16 = 27x8.5R16
215/70R16 = 27.9x8.5R16
225/65R16 = 27.5x8.9R16
235/60R16 = 27.1x9.3R16
295/50R16 = 27.6x11.6R16
355/40R16 = 27.2X14R16

#### 28" Tire Diameter

195/80R16 = 28.3x7.7R16
205/80R16 = 28.9x8.1R16
215/75R16 = 28.7x8.5R16
225/70R16 = 28.4x8.9R16
235/65R16 = 28x9.3R16
255/60R16 = 28x10R16
28X11.5R16

#### 29" Tire Diameter

225/75R16 = 29.3x8.9R16
235/70R16 = 29x9.3R16
235/75R16 = 29.9x9.3R16
245/70R16 = 29.5x9.7R16
255/65R16 = 29.1x10R16
275/60R16 = 29X10.8R16
285/60R16 = 29.5X11.2R16

#### 30" Tire Diameter

215/85R16 = 30.4x8.5R16
235/80R16 = 30.8x9.3R16
245/75R16 = 30.5x9.7R16
255/70R16 = 30.1x10R16
265/70R16 = 30.6x10.4R16
30X11.5R16

#### 31" Tire Diameter

225/85R16 = 31.1X8.9R16
235/85R16 = 31.7x9.3R16
265/75R16 = 31.6x10.4R16
275/70R16 = 31.2x10.8R16
285/70R16 = 31.7x11.2R16
31X10.5R16
31X11R16
31X11.5R16
31X12.5R16

#### 32" Tire Diameter

265/80R16 = 32.7X10.4R16
285/75R16 = 32.8x11.2R16
305/70R16 = 32.8x12R16
32X10R16
32X11.5R16
32X9R16

#### 33" Tire Diameter

255/85R16 = 33.1x10R16
295/75R16 = 33.4x11.6R16
33X10.5R16
33X11.5R16
33X12.5R16
33X13R16
33X13.5R16
33X14R16
33X14.5R16
33.5X16.5R16

#### 34" Tire Diameter

315/75R16 = 34.6x12.4R16
34X10.5R16
34X12.5R16
34X13.5R16
34X9R16
34.5X17R16

#### 35" Tire Diameter

35X10.5R16
35X12.5R16
35X14.5R16
35X15R16
35X16R16
375/65R16 = 35.2x14.8R16

#### 36" Tire Diameter

325/80R16 = 36.5x12.8R16
345/75R16 = 36.4x13.6R16
36X12.5R16
36X13R16
36X13.5R16
36X14.5R16

#### 37" Tire Diameter

365/75R16 = 37.6x14.4R16
37X12.5R16
37X13R16
37X13.5R16
37X14R16
37X14.5R16
385/70R16 = 37.2x15.2R16
395/70R16 = 37.8x15.6R16

39X13.5R16
39.5X13.5R16
39.5X15R16

40X16R16

41X14.5R16

42X14R16
42X15R16
42.5X13.5R16

44X19.5R16
44X21R16

46X19.5R16

33X11.5R16.5
33X12.5R16.5
33X14R16.5
33X14.5R16.5
33X15.5R16.5

36X12.5R16.5
36X13.5R16.5
36X14.5R16.5
36X16R16.5

37X12.5R16.5
37X13R16.5
37X14R16.5

39X13.5R16.5
39.5X13.5R16.5
39.5X15R16.5
39.5X18R16.5

42X14R16.5
42X15R16.5
42.5X13.5R16.5

43X14.5R16.5

44X18.5R16.5
44X19.5R16.5
44X21R16.5

47X17R16.5

49X21R16.5

### Gear Ratio Tire Size Conversion Chart for 17" Wheels

#### 23" Tire Diameter

125/70R17 = 23.9X4.9R17
195/40R17 = 23.1x7.7R17
195/45R17 = 23.9x7.7R17
205/40R17 = 23.5x8.1R17
215/35R17 = 23x8.5R17
215/40R17 = 23.8x8.5R17
225/35R17 = 23.2x8.9R17
245/35R17 = 23.8x9.7R17

#### 24" Tire Diameter

125/80R17 = 24.9X4.9R17
135/70R17 = 24.4X5.3R17
205/45R17 = 24.3x8.1R17
215/45R17 = 24.6x8.5R17
225/40R17 = 24.1x8.9R17
235/40R17 = 24.4x9.3R17
245/40R17 = 24.7x9.7R17
275/35R17 = 24.6x10.8R17

#### 25" Tire Diameter

135/80R17 = 25.5X5.3R17
145/70R17 = 25X5.7R17
155/70R17 = 25.5X6.1R17
205/50R17 = 25.1x8.1R17
205/55R17 = 25.9x8.1R17
215/50R17 = 25.5X8.5R17
225/45R17 = 25x8.9R17
225/50R17 = 25.9x8.9R17
235/45R17 = 25.3x9.3R17
245/45R17 = 25.7x9.7R17
255/40R17 = 25x10R17
265/40R17 = 25.3x10.4R17
275/40R17 = 25.7x10.8R17
295/35R17 = 25.1x11.6R17
315/35R17 = 25.7x12.4R17

#### 26" Tire Diameter

135/90R17 = 26.6X5.3R17
145/80R17 = 26.1X5.7R17
155/80R17 = 26.8X6.1R17
215/55R17 = 26.3x8.5R17
225/55R17 = 26.7x8.9R17
235/50R17 = 26.3x9.3R17
245/50R17 = 26.6x9.7R17
255/45R17 = 26x10R17
26X11.5R17
285/40R17 = 26x11.2R17
295/40R17 = 26.3x11.6R17
335/35R17 = 26.2x13.2R17

#### 27" Tire Diameter

145/90R17 = 27.3X5.7R17
165/80R17 = 27.4X6.5R17
215/60R17 = 27.2x8.5R17
225/60R17 = 27.6x8.9R17
235/55R17 = 27.2x9.3R17
245/55R17 = 27.6x9.7R17
255/50R17 = 27x10R17
275/50R17 = 27.8X10.8R17
345/40R17 = 27.9x13.6R17

#### 28" Tire Diameter

155/90R17 = 28X6.1R17
165/90R17 = 28.7X6.5R17
215/65R17 = 28x8.5R17
215/70R17 = 28.9x8.5R17
225/65R17 = 28.5x8.9R17
235/60R17 = 28.1x9.3R17
245/60R17 = 28.6X9.6R17
255/55R17 = 28x10R17
275/55R17 = 28.9x10.8R17

#### 29" Tire Diameter

225/70R17 = 29.4x8.9R17
235/65R17 = 29x9.3R17
245/65R17 = 29.5x9.7R17
255/60R17 = 29x10R17
265/60R17 = 29.5x10.4R17

#### 30" Tire Diameter

225/75R17 = 30.3x8.9R17
235/70R17 = 30x9.3R17
235/75R17 = 30.9x9.3R17
245/70R17 = 30.5x9.7R17
255/65R17 = 30.1x10R17
265/65R17 = 30.6x10.4R17
275/60R17 = 30x10.8R17
275/65R17 = 30.1x10.8R17
285/60R17 = 30.5X11.2R17

#### 31" Tire Diameter

235/80R17 = 31.8x9.3R17
245/75R17 = 31.5x9.7R17
255/70R17 = 31.1x10R17
265/70R17 = 31.6x10.4R17
285/65R17 = 31.6x11.2R17
31X10.5R17

#### 32" Tire Diameter

235/85R17 = 32.7X9.3R17
255/75R17 = 32.1x10R17
275/70R17 = 32.2x10.8R17
285/70R17 = 32.7x11.2R17
305/65R17 = 32.6x12R17
32X10.5R17
32X11.5R17

#### 33" Tire Diameter

255/80R17 = 33.1x10R17
285/75R17 = 33.8x11.2R17
295/70R17 = 33.3x11.6R17
305/70R17 = 33.8x12R17
33X10.5R17
33X12.5R17
33X13R17
33X13.5R17

#### 34" Tire Diameter

315/70R17 = 34.4x12.4R17
325/70R17 = 34.9x12.8R17
34X10.5R17

35X10.5R17
35X12.5R17
35X14.5R17

#### 36" Tire Diameter

355/70R17 = 36.6x14R17
36X12.5R17
36X13.5R17

37X12.5R17
37X13R17
37X13.5R17
37X14R17

38X13.5R17
38X14.5R17
38X15.5R17
38.5X14.5R17

39X13.5R17
39.5X13.5R17
39.5X15R17

40X13.5R17
40X14.5R17
40X16R17

41X14.5R17

42X14R17
42X14.5R17
42X15R17
42.5X13.5R17

43X14.5R17

44X19.5R17
44X21R17

47X17R17

49X21R17

54X19.5R17

### Gear Ratio Tire Size Conversion Chart for 18" Wheels

#### 23" Tire Diameter

215/35R18 = 23.9x8.5R18

#### 24" Tire Diameter

125/70R18 = 24.9X4.9R18
205/40R18 = 24.5x8.1R18
215/40R18 = 24.8x8.5R18
225/35R18 = 24.2x8.9R18
235/35R18 = 24.5x9.3R18
245/35R18 = 24.8x9.7R18
285/30R18 = 24.7x11.2R18

#### 25" Tire Diameter

215/45R18 = 25.6x8.5R18
225/40R18 = 25.1x8.9R18
235/40R18 = 25.4x9.3R18
245/40R18 = 25.7x9.7R18
255/35R18 = 25x10R18
265/35R18 = 25.3x10.4R18
275/35R18 = 25.6x10.8R18
285/35R18 = 25.9x11.2R18
295/30R18 = 25x11.6R18
305/30R18 = 25.2x12R18
315/30R18 = 25.4x12.4R18
335/30R18 = 25.9x13.2R18

#### 26" Tire Diameter

135/80R18 = 26.5X5.3R18
145/70R18 = 26X5.7R18
225/45R18 = 26x8.9R18
225/50R18 = 26.9x8.9R18
235/45R18 = 26.3x9.3R18
245/45R18 = 26.7x9.7R18
255/40R18 = 26x10R18
26X12R18
265/40R18 = 26.3x10.4R18
275/40R18 = 26.7x10.8R18
295/35R18 = 26.1x11.6R18
305/35R18 = 26.4x12R18
315/35R18 = 26.7x12.4R18
345/30R18 = 26.1x13.6R18

#### 27" Tire Diameter

145/80R18 = 27.1X5.7R18
215/55R18 = 27.3x8.5R18
225/55R18 = 27.7x8.9R18
235/50R18 = 27.3x9.3R18
245/50R18 = 27.6x9.7R18
255/45R18 = 27x10R18
265/45R18 = 27.4x10.4R18
275/45R18 = 27.7x10.8R18
285/40R18 = 27x11.2R18
295/40R18 = 27.3x11.6R18
305/40R18 = 27.6X12R18
315/40R18 = 27.9x12.4R18
325/35R18 = 27x12.8R18
345/35R18 = 27.5x13.6R18

#### 28" Tire Diameter

155/85R18 = 28.4X6.1R18
225/60R18 = 28.6x8.9R18
235/55R18 = 28.2x9.3R18
245/55R18 = 28.6x9.7R18
255/50R18 = 28x10R18
265/50R18 = 28.4X10.4R18
285/45R18 = 28.1x11.2R18
295/45R18 = 28.5x11.6R18
305/45R18 = 28.8X12R18

#### 29" Tire Diameter

225/65R18 = 29.5X8.9R18
235/60R18 = 29.1x9.3R18
245/60R18 = 29.6x9.7R18
255/55R18 = 29x10R18
265/55R18 = 29.5X10.4R18
275/55R18 = 29.9x10.8R18
285/50R18 = 29.2x11.2R18

#### 30" Tire Diameter

175/90R18 = 30.4X6.9R18
235/65R18 = 30x9.3R18
245/65R18 = 30.5x9.7R18
255/60R18 = 30x10R18
265/60R18 = 30.5x10.4R18
285/55R18 = 30.3x11.2R18

#### 31" Tire Diameter

255/65R18 = 31.1x10R18
265/65R18 = 31.6x10.4R18
275/60R18 = 31x10.8R18
285/60R18 = 31.5x11.2R18

#### 32" Tire Diameter

255/70R18 = 32.1x10R18
265/70R18 = 32.6x10.4R18
275/65R18 = 32.1x10.8R18
285/65R18 = 32.6x11.2R18
305/60R18 = 32.4x12R18

#### 33" Tire Diameter

275/70R18 = 33.2x10.8R18
285/70R18 = 33.7x11.2R18
295/65R18 = 33.1x11.6R18
305/65R18 = 33.6x12R18
325/60R18 = 33.4x12.8R18
33X11.5R18
33X12.5R18
33X13.5R18

#### 34" Tire Diameter

285/75R18 = 34.8x11.2R18
295/70R18 = 34.3X11.6R18
305/70R18 = 34.8x12R18
325/65R18 = 34.6x12.8R18

#### 35" Tire Diameter

315/70R18 = 35.4x12.4R18
35X12.5R18
35X13.5R18
35X14.5R18

#### 36" Tire Diameter

355/65R18 = 36.2x14R18
36X13.5R18

37X12.5R18
37X13.5R18

38X13.5R18
38X14.5R18
38X15R18
38X15.5R18
38.5X14.5R18

40X13.5R18
40X14.5R18

41X14.5R18

### Gear Ratio Tire Size Conversion Chart for 19" Wheels

#### 24" Tire Diameter

215/35R19 = 24.9x8.5R19
235/30R19 = 24.6x9.3R19
245/30R19 = 24.8x9.7R19

#### 25" Tire Diameter

115/70R19 = 25.3X4.5R19
125/70R19 = 25.9X4.9R19
225/35R19 = 25.2x8.9R19
235/35R19 = 25.5x9.3R19
245/35R19 = 25.8x9.7R19
255/30R19 = 25x10R19
265/30R19 = 25.3x10.4R19
275/30R19 = 25.5x10.8R19
285/30R19 = 25.7x11.2R19
315/25R19 = 25.2x12.4R19

#### 26" Tire Diameter

225/40R19 = 26.1x8.9R19
235/40R19 = 26.4x9.3R19
245/40R19 = 26.7x9.7R19
255/35R19 = 26x10R19
265/35R19 = 26.3x10.4R19
275/35R19 = 26.6x10.8R19
285/35R19 = 26.9x11.2R19
295/30R19 = 26x11.6R19
305/30R19 = 26.2x12R19
315/30R19 = 26.4x12.4R19
325/30R19 = 26.7x12.8R19
335/30R19 = 26.9x13.2R19

#### 27" Tire Diameter

155/70R19 = 27.5x6.1R19
175/60R19 = 27.3x6.9R19
225/45R19 = 27x8.9R19
235/45R19 = 27.3x9.3R19
245/45R19 = 27.7x9.7R19
255/40R19 = 27x10R19
265/40R19 = 27.3x10.4R19
275/40R19 = 27.7x10.8R19
295/35R19 = 27.1x11.6R19
305/35R19 = 27.4X12R19
315/35R19 = 27.7x12.4R19
345/30R19 = 27.1x13.6R19
355/30R19 = 27.4x14R19

#### 28" Tire Diameter

145/80R19 = 28.1X5.7R19
155/80R19 = 28.8X6.1R19
225/55R19 = 28.7x8.9R19
235/50R19 = 28.3x9.3R19
245/50R19 = 28.6x9.7R19
255/45R19 = 28x10R19
275/45R19 = 28.7x10.8R19
285/40R19 = 28x11.2R19
315/40R19 = 28.9x12.4R19
345/35R19 = 28.5x13.6R19

#### 29" Tire Diameter

235/55R19 = 29.2x9.3R19
245/55R19 = 29.6x9.7R19
255/50R19 = 29x10R19
265/50R19 = 29.4x10.4R19
275/50R19 = 29.8X10.8R19
285/45R19 = 29.1x11.2R19
295/45R19 = 29.5x11.6R19

#### 30" Tire Diameter

165/90R19 = 30.7X6.5R19
175/80R19 = 30X6.9R19
255/55R19 = 30x10R19
265/55R19 = 30.5x10.4R19
275/55R19 = 30.9x10.8R19

#### 31" Tire Diameter

235/65R19 = 31X9.3R19
255/60R19 = 31x10R19

### Gear Ratio Tire Size Conversion Chart for 20" Wheels

#### 25" Tire Diameter

215/30R20 = 25.1X8.5R20
225/30R20 = 25.3x8.9R20
235/30R20 = 25.6x9.3R20
245/30R20 = 25.8x9.7R20
275/25R20 = 25.4X10.8R20
285/25R20 = 25.6x11.2R20
295/25R20 = 25.8x11.6R20

#### 26" Tire Diameter

145/60R20 = 26.9X5.7R20
225/35R20 = 26.2x8.9R20
235/35R20 = 26.5x9.3R20
245/35R20 = 26.8x9.7R20
255/30R20 = 26x10R20
265/30R20 = 26x10.4R20
275/30R20 = 26.5x10.8R20
285/30R20 = 26.7x11.2R20
305/25R20 = 26x12R20
315/25R20 = 26.2x12.4R20
325/25R20 = 26.4x12.8R20
335/25R20 = 26.6x13.2R20
345/25R20 = 26.8X13.6R20

#### 27" Tire Diameter

155/60R20 = 27.3x6.1R20
155/65R20 = 27.9X6.1R20
165/60R20 = 27.8X6.5R20
175/55R20 = 27.6x6.9R20
195/50R20 = 27.7x7.7R20
215/45R20 = 27.6x8.5R20
235/40R20 = 27.4x9.3R20
245/40R20 = 27.7x9.7R20
255/35R20 = 27x10R20
265/35R20 = 27x10.4R20
275/35R20 = 27.6x10.8R20
285/35R20 = 27.9x11.2R20
295/30R20 = 27x11.6R20
305/30R20 = 27.2x12R20
315/30R20 = 27.4x12.4R20
325/30R20 = 27.7x12.8R20
335/30R20 = 27.9x13.2R20

#### 28" Tire Diameter

235/45R20 = 28.3x9.3R20
245/45R20 = 28.7x9.7R20
255/40R20 = 28x10R20
265/40R20 = 28x10.4R20
275/40R20 = 28.7x10.8R20
295/35R20 = 28.1x11.6R20
305/35R20 = 28.4x12R20
315/35R20 = 28.7x12.4R20
345/30R20 = 28.1x13.6R20

#### 29" Tire Diameter

245/50R20 = 29.6x9.7R20
255/45R20 = 29x10R20
265/45R20 = 29.4x10.4R20
275/45R20 = 29.7x10.8R20
285/40R20 = 29x11.2R20
295/40R20 = 29.3x11.6R20

#### 30" Tire Diameter

235/55R20 = 30.2x9.3R20
255/50R20 = 30x10R20
265/50R20 = 30.4x10.4R20
275/50R20 = 30.8x10.8R20
295/45R20 = 30.5x11.6R20
305/45R20 = 30.8x12R20

#### 31" Tire Diameter

245/60R20 = 31.6x9.7R20
255/55R20 = 31x10R20
275/55R20 = 31.9x10.8R20
285/50R20 = 31.2x11.2R20
295/50R20 = 31.6x11.6R20
31X18R20

#### 32" Tire Diameter

265/60R20 = 32.5x10.4R20
285/55R20 = 32.3x11.2R20
295/55R20 = 32.8X11.6R20
305/50R20 = 32x12R20
315/50R20 = 32.4x12.4R20
325/50R20 = 32.8x12.8R20

#### 33" Tire Diameter

275/60R20 = 33x10.8R20
285/60R20 = 33.5x11.2R20
295/60R20 = 33.9X11.6R20
305/55R20 = 33.2x12R20
33X12.5R20
33X13.5R20

#### 34" Tire Diameter

275/65R20 = 34.1x10.8R20
285/65R20 = 34.6x11.2R20
305/60R20 = 34.4x12R20
315/60R20 = 34.9x12.4R20
355/50R20 = 34X14R20

#### 35" Tire Diameter

295/65R20 = 35.1X11.6R20
325/60R20 = 35.4x12.8R20
35X12.5R20
35X13.5R20
35X14.5R20

#### 36" Tire Diameter

355/60R20 = 36.8x14R20
36X13.5R20
36X15.5R20

37X12.5R20
37X13.5R20

38X13.5R20
38X14.5R20
38X15.5R20
38.5X14.5R20

39X13.5R20
39.5X13.5R20
39.5X15R20

40X14.5R20
40X15.5R20

41X14.5R20

42X14.5R20
42X15R20
42.5X13.5R20

43X14.5R20

44X19.5R20
44X21R20

46X19.5R20

49X21R20

54X19.5R20

### Gear Ratio Tire Size Conversion Chart for 21" Wheels

#### 26" Tire Diameter

245/30R21 = 26.8x9.7R21
295/25R21 = 26.8x11.6R21

#### 27" Tire Diameter

245/35R21 = 27.8x9.7R21
255/30R21 = 27x10R21
265/30R21 = 27.3x10.4R21
275/30R21 = 27.5x10.8R21
285/30R21 = 27.7x11.2R21
305/25R21 = 27x12R21
325/25R21 = 27.4x12.8R21

#### 28" Tire Diameter

245/40R21 = 28.7x9.7R21
265/35R21 = 28.3x10.4R21
275/35R21 = 28.6x10.8R21
285/35R21 = 28.9x11.2R21
295/30R21 = 28x11.6R21
305/30R21 = 28.2x12R21
325/30R21 = 28.7x12.8R21
355/25R21 = 28x14R21

#### 29" Tire Diameter

255/40R21 = 29X10R21
265/40R21 = 29.3x10.4R21
275/40R21 = 29.7x10.8R21
295/35R21 = 29.1x11.6R21

#### 30" Tire Diameter

265/45R21 = 30.4x10.4R21
275/45R21 = 30.7X11.8R21
295/40R21 = 30.3x11.6R21

#### 31" Tire Diameter

255/50R21 = 31x10R21
285/45R21 = 31.1x11.2R21

### Gear Ratio Tire Size Conversion Chart for 22" Wheels

#### 27" Tire Diameter

235/30R22 = 27.6x9.3R22
245/30R22 = 27.8x9.7R22
275/25R22 = 27.4x10.8R22
285/25R22 = 27.6x11.2R22
295/25R22 = 27.8x11.6R22

#### 28" Tire Diameter

255/30R22 = 28x10R22
265/30R22 = 28.3x10.4R22
275/30R22 = 28.5X10.8R22
285/30R22 = 28.7x11.2R22
315/25R22 = 28.2x12.4R22
335/25R22 = 28.6x13.2R22

#### 29" Tire Diameter

255/35R22 = 29x10R22
265/35R22 = 29.3x10.4R22
285/35R22 = 29.9x11.2R22
295/30R22 = 29x11.6R22
305/30R22 = 29.2x12R22
315/30R22 = 29.4X12.4R22

#### 30" Tire Diameter

265/40R22 = 30.3x10.4R22
275/40R22 = 30.7x10.8R22

#### 31" Tire Diameter

275/45R22 = 31.7x10.8R22
285/40R22 = 31x11.2R22
295/40R22 = 31.3x11.6R22
305/40R22 = 31.6x12R22

#### 32" Tire Diameter

275/50R22 = 32.8x10.8R22
285/45R22 = 32.1x11.2R22
305/45R22 = 32.8x12R22

#### 33" Tire Diameter

285/50R22 = 33.2x11.2R22
33X12.5R22

#### 34" Tire Diameter

285/55R22 = 34.3X11.2R22
305/50R22 = 34x12R22
325/50R22 = 34.8x12.8R22

35X12.5R22
35X14.5R22

#### 36" Tire Diameter

325/55R22 = 36.1x12.8R22
335/55R22 = 36.5X13.2R22

#### 37" Tire Diameter

325/60R22 = 37.4x12.8R22
37X13.5R22

#### 38" Tire Diameter

355/60R22 = 38.8x14R22

40X14.5R22
40X15.5R22

41X14.5R22

42.5X13.5R22

### Gear Ratio Tire Size Conversion Chart for 23" Wheels

#### 28" Tire Diameter

265/25R23 = 28.2X10.4R23

#### 30" Tire Diameter

285/35R23 = 30.9x11.2R23

#### 32" Tire Diameter

285/40R23 = 32x11.2R23
305/40R23 = 32.6x12R23

### Gear Ratio Tire Size Conversion Chart for 24" Wheels

#### 29" Tire Diameter

275/25R24 = 29.4x10.8R24

#### 30" Tire Diameter

255/30R24 = 30x10R24
275/30R24 = 30.5x10.8R24
285/30R24 = 30.7x11.2R24

#### 31" Tire Diameter

285/35R24 = 31.9x11.2R24

#### 32" Tire Diameter

295/35R24 = 32.1x11.6R24
305/35R24 = 32.4x12R24
315/35R24 = 32.7x12.4R24
405/25R24 = 32x15.9R24

#### 33" Tire Diameter

285/40R24 = 33x11.2R24
295/40R24 = 33.3x11.6R24

#### 34" Tire Diameter

385/35R24 = 34.6x15.2R24

#### 35" Tire Diameter

325/45R24 = 35.5x12.8R24

#### 36" Tire Diameter

315/50R24 = 36.4X12.4R24

37X13.5R24

38X13.5R24
38X14R24

40X14.5R24

### Gear Ratio Tire Size Conversion Chart for 26" Wheels

#### 31" Tire Diameter

275/25R26 = 31.4x10.8R26
295/25R26 = 31.8x11.6R26

#### 33" Tire Diameter

295/30R26 = 33x11.6R26
305/30R26 = 33.2x12R26

#### 35" Tire Diameter

315/40R26 = 35.9x12.4R26

### Gear Ratio Tire Size Conversion Chart for 28" Wheels

#### 33" Tire Diameter

295/25R28 = 33.8x11.6R28

#### 37" Tire Diameter

325/35R28 = 37x12.8R28

### Gear Ratio Tire Size Conversion Chart for 30" Wheels

#### 37" Tire Diameter

315/30R30 = 37.4x12.4R30

## Gear Ratio Tire Size Conversion Charts by Diameter

• 21"
• 22"
• 23"
• 24"
• 25"
• 26"
• 27"
• 28"
• 29"
• 30"
• 31"
• 32"
• 33"
• 34"
• 35"
• 36"
• 37"
• 38"
• 39"
• 40"
• 41-54"

### 21" Diameter Gear Ratio Tire Size Conversion Chart

#### 13" Wheel Size

185/60R13 = 21.7x7.3R13
215/50R13 = 21.5X8.5R13
225/45R13 = 21x8.9R13
225/50R13 = 21.9x8.9R13
255/40R13 = 21x10R13

#### 15" Wheel Size

115/70R15 = 21.3X4.5R15
125/70R15 = 21.9X4.9R15
195/45R15 = 21.9x7.7R15

### 22" Diameter Gear Ratio Tire Size Conversion Chart

#### 13" Wheel Size

155/80R13 = 22.8x6.1R13
175/70R13 = 22.6x6.9R13
205/60R13 = 22.7x8.1R13
22X8R13

#### 14" Wheel Size

165/65R14 = 22.4x6.5R14
185/55R14 = 22x7.3R14
185/60R14 = 22.7x7.3R14
195/55R14 = 22.4x7.7R14
205/50R14 = 22.1x8.1R14
205/55R14 = 22.9x8.1R14
225/50R14 = 22.9x8.9R14

#### 15" Wheel Size

125/80R15 = 22.9X4.9R15
145/65R15 = 22.4x5.7R15
155/60R15 = 22.3x6.1R15
165/60R15 = 22.8x6.5R15
175/55R15 = 22.6x6.9R15
195/50R15 = 22.7x7.7R15
22X8R15
22.5X4.5R15
245/40R15 = 22.7X9.6R15
275/35R15 = 22.6x10.8R15

#### 16" Wheel Size

125/70R16 = 22.9X4.9R16
175/50R16 = 22.9x6.9R16
195/40R16 = 22.1x7.7R16
195/45R16 = 22.9x7.7R16
205/40R16 = 22.5x8.1R16
215/35R16 = 22x8.5R16
215/40R16 = 22.8x8.5R16

### 23" Diameter Gear Ratio Tire Size Conversion Chart

#### 13" Wheel Size

165/80R13 = 23.4X6.5R13
185/70R13 = 23.2x7.3R13

#### 14" Wheel Size

175/65R14 = 23x6.9R14
175/70R14 = 23.6x6.9R14
185/65R14 = 23.5x7.3R14
195/60R14 = 23.2x7.7R14
205/60R14 = 23.7x8.1R14

#### 15" Wheel Size

135/80R15 = 23.5X5.3R15
175/60R15 = 23.3x6.9R15
185/55R15 = 23x7.3R15
185/60R15 = 23.7x7.3R15
195/55R15 = 23.4x7.7R15
205/50R15 = 23.1x8.1R15
205/55R15 = 23.9x8.1R15
225/45R15 = 23x8.9R15
225/50R15 = 23.9x8.9R15

#### 16" Wheel Size

125/80R16 = 23.9X4.9R16
135/70R16 = 23.4X5.3R16
175/55R16 = 23.6x6.9R16
185/50R16 = 23.3X7.3R16
195/50R16 = 23.7x7.7R16
205/45R16 = 23.3x8.1R16
215/45R16 = 23.6x8.5R16

#### 17" Wheel Size

125/70R17 = 23.9X4.9R17
195/40R17 = 23.1x7.7R17
195/45R17 = 23.9x7.7R17
205/40R17 = 23.5x8.1R17
215/35R17 = 23x8.5R17
215/40R17 = 23.8x8.5R17
225/35R17 = 23.2x8.9R17
245/35R17 = 23.8x9.7R17

#### 18" Wheel Size

215/35R18 = 23.9x8.5R18

### 24" Diameter Gear Ratio Tire Size Conversion Chart

#### 13" Wheel Size

175/80R13 = 24x6.9R13
185/80R13 = 24.7x7.3R13
24.5X8R13
24.5X9R13

#### 14" Wheel Size

185/70R14 = 24.2x7.3R14
185/75R14 = 24.9X7.3R14
195/65R14 = 24x7.7R14
195/70R14 = 24.7x7.7R14
215/60R14 = 24.2x8.5R14
225/60R14 = 24.6x8.9R14

#### 15" Wheel Size

135/90R15 = 24.6X5.3R15
155/80R15 = 24.8X6.1R15
175/65R15 = 24x6.9R15
185/65R15 = 24.5x7.3R15
195/60R15 = 24.2x7.7R15
205/60R15 = 24.7x8.1R15
225/55R15 = 24.7x8.9R15
235/50R15 = 24.3x9.3R15
24X4.5R15
24X5R15
24.5X8R15
245/50R15 = 24.6x9.7R15
345/35R15 = 24.5x13.6R15

#### 16" Wheel Size

125/85R16 = 24.4X4.9R16
125/90R16 = 24.9X4.9R16
135/80R16 = 24.5X5.3R16
175/60R16 = 24.3x6.9R16
185/55R16 = 24x7.3R16
195/55R16 = 24.4x7.7R16
205/50R16 = 24.1x8.1R16
205/55R16 = 24.9x8.1R16
215/50R16 = 24.5X8.5R16
225/45R16 = 24x8.9R16
225/50R16 = 24.9x8.9R16
245/45R16 = 24.7x9.7R16

#### 17" Wheel Size

125/80R17 = 24.9X4.9R17
135/70R17 = 24.4X5.3R17
205/45R17 = 24.3x8.1R17
215/45R17 = 24.6x8.5R17
225/40R17 = 24.1x8.9R17
235/40R17 = 24.4x9.3R17
245/40R17 = 24.7x9.7R17
275/35R17 = 24.6x10.8R17

#### 18" Wheel Size

125/70R18 = 24.9X4.9R18
205/40R18 = 24.5x8.1R18
215/40R18 = 24.8x8.5R18
225/35R18 = 24.2x8.9R18
235/35R18 = 24.5x9.3R18
245/35R18 = 24.8x9.7R18
285/30R18 = 24.7x11.2R18

#### 19" Wheel Size

215/35R19 = 24.9x8.5R19
235/30R19 = 24.6x9.3R19
245/30R19 = 24.8x9.7R19

### 25" Diameter Gear Ratio Tire Size Conversion Chart

#### 14" Wheel Size

195/75R14 = 25.5x7.7R14
205/70R14 = 25.3x8.1R14
215/70R14 = 25.9x8.5R14
235/60R14 = 25.1x9.3R14
245/60R14 = 25.6x9.7R14

#### 15" Wheel Size

165/80R15 = 25.4X6.5R15
185/70R15 = 25.2x7.3R15
195/65R15 = 25x7.7R15
195/70R15 = 25.7x7.7R15
205/65R15 = 25.5x8.1R15
215/60R15 = 25.2x8.5R15
225/60R15 = 25.6x8.9R15
265/50R15 = 25.4X10.4R15
275/50R15 = 25.8x10.8R15

#### 16" Wheel Size

135/90R16 = 25.6X5.3R16
145/80R16 = 25.1X5.7R16
195/60R16 = 25.2x7.7R16
205/60R16 = 25.7x8.1R16
215/55R16 = 25.3x8.5R16
225/55R16 = 25.7x8.9R16
245/50R16 = 25.6x9.7R16
265/45R16 = 25.4X10.4R16
275/45R16 = 25.7x10.8R16
315/40R16 = 25.9X12.4R16

#### 17" Wheel Size

135/80R17 = 25.5X5.3R17
145/70R17 = 25X5.7R17
155/70R17 = 25.5X6.1R17
205/50R17 = 25.1x8.1R17
205/55R17 = 25.9x8.1R17
215/50R17 = 25.5X8.5R17
225/45R17 = 25x8.9R17
225/50R17 = 25.9x8.9R17
235/45R17 = 25.3x9.3R17
245/45R17 = 25.7x9.7R17
255/40R17 = 25x10R17
265/40R17 = 25.3x10.4R17
275/40R17 = 25.7x10.8R17
295/35R17 = 25.1x11.6R17
315/35R17 = 25.7x12.4R17

#### 18" Wheel Size

215/45R18 = 25.6x8.5R18
225/40R18 = 25.1x8.9R18
235/40R18 = 25.4x9.3R18
245/40R18 = 25.7x9.7R18
255/35R18 = 25x10R18
265/35R18 = 25.3x10.4R18
275/35R18 = 25.6x10.8R18
285/35R18 = 25.9x11.2R18
295/30R18 = 25x11.6R18
305/30R18 = 25.2x12R18
315/30R18 = 25.4x12.4R18
335/30R18 = 25.9x13.2R18

#### 19" Wheel Size

115/70R19 = 25.3X4.5R19
125/70R19 = 25.9X4.9R19
225/35R19 = 25.2x8.9R19
235/35R19 = 25.5x9.3R19
245/35R19 = 25.8x9.7R19
255/30R19 = 25x10R19
265/30R19 = 25.3x10.4R19
275/30R19 = 25.5x10.8R19
285/30R19 = 25.7x11.2R19
315/25R19 = 25.2x12.4R19

#### 20" Wheel Size

215/30R20 = 25.1X8.5R20
225/30R20 = 25.3x8.9R20
235/30R20 = 25.6x9.3R20
245/30R20 = 25.8x9.7R20
275/25R20 = 25.4X10.8R20
285/25R20 = 25.6x11.2R20
295/25R20 = 25.8x11.6R20

### 26" Diameter Gear Ratio Tire Size Conversion Chart

#### 14" Wheel Size

205/75R14 = 26.1x8.1R14
215/75R14 = 26.7x8.5R14
215/75R14 = 26.7x8.5R14
225/70R14 = 26.4x8.9R14
26X8.5R14

#### 15" Wheel Size

205/70R15 = 26.3x8.1R15
215/65R15 = 26x8.5R15
215/70R15 = 26.9x8.5R15
235/60R15 = 26.1x9.3R15
245/60R15 = 26.6x9.7R15
26X10R15
26X10.5R15
26X11.5R15
26X6R15
26X7.5R15
26X8R15
26X8.5R15
295/50R15 = 26.6x11.6R15

#### 16" Wheel Size

195/65R16 = 26X7.7R16
205/65R16 = 26.5x8.1R16
215/60R16 = 26.2x8.5R16
225/60R16 = 26.6x8.9R16
235/55R16 = 26.2x9.3R16
255/50R16 = 26x10R16
26X11.5R16

#### 17" Wheel Size

135/90R17 = 26.6X5.3R17
145/80R17 = 26.1X5.7R17
155/80R17 = 26.8X6.1R17
215/55R17 = 26.3x8.5R17
225/55R17 = 26.7x8.9R17
235/50R17 = 26.3x9.3R17
245/50R17 = 26.6x9.7R17
255/45R17 = 26x10R17
26X11.5R17
285/40R17 = 26x11.2R17
295/40R17 = 26.3x11.6R17
335/35R17 = 26.2x13.2R17

#### 18" Wheel Size

135/80R18 = 26.5X5.3R18
145/70R18 = 26X5.7R18
225/45R18 = 26x8.9R18
225/50R18 = 26.9x8.9R18
235/45R18 = 26.3x9.3R18
245/45R18 = 26.7x9.7R18
255/40R18 = 26x10R18
26X12R18
265/40R18 = 26.3x10.4R18
275/40R18 = 26.7x10.8R18
295/35R18 = 26.1x11.6R18
305/35R18 = 26.4x12R18
315/35R18 = 26.7x12.4R18
345/30R18 = 26.1x13.6R18

#### 19" Wheel Size

225/40R19 = 26.1x8.9R19
235/40R19 = 26.4x9.3R19
245/40R19 = 26.7x9.7R19
255/35R19 = 26x10R19
265/35R19 = 26.3x10.4R19
275/35R19 = 26.6x10.8R19
285/35R19 = 26.9x11.2R19
295/30R19 = 26x11.6R19
305/30R19 = 26.2x12R19
315/30R19 = 26.4x12.4R19
325/30R19 = 26.7x12.8R19
335/30R19 = 26.9x13.2R19

#### 20" Wheel Size

145/60R20 = 26.9X5.7R20
225/35R20 = 26.2x8.9R20
235/35R20 = 26.5x9.3R20
245/35R20 = 26.8x9.7R20
255/30R20 = 26x10R20
265/30R20 = 26x10.4R20
275/30R20 = 26.5x10.8R20
285/30R20 = 26.7x11.2R20
305/25R20 = 26x12R20
315/25R20 = 26.2x12.4R20
325/25R20 = 26.4x12.8R20
335/25R20 = 26.6x13.2R20
345/25R20 = 26.8X13.6R20

#### 21" Wheel Size

245/30R21 = 26.8x9.7R21
295/25R21 = 26.8x11.6R21

### 27" Diameter Gear Ratio Tire Size Conversion Chart

#### 15" Wheel Size

205/75R15 = 27.1x8.1R15
215/75R15 = 27.7x8.5R15
225/70R15 = 27.4x8.9R15
255/60R15 = 27x10R15
27X10.5R15
27X9.5R15
27.5X4.5R15
295/55R15 = 27.8X11.6R15
325/50R15 = 27.8x12.8R15

#### 16" Wheel Size

155/90R16 = 27X6.1R16
195/75R16 = 27.5x7.7R16
205/70R16 = 27.3x8.1R16
215/65R16 = 27x8.5R16
215/70R16 = 27.9x8.5R16
225/65R16 = 27.5x8.9R16
235/60R16 = 27.1x9.3R16
295/50R16 = 27.6x11.6R16
355/40R16 = 27.2X14R16

#### 17" Wheel Size

145/90R17 = 27.3X5.7R17
165/80R17 = 27.4X6.5R17
215/60R17 = 27.2x8.5R17
225/60R17 = 27.6x8.9R17
235/55R17 = 27.2x9.3R17
245/55R17 = 27.6x9.7R17
255/50R17 = 27x10R17
275/50R17 = 27.8X10.8R17
345/40R17 = 27.9x13.6R17

#### 18" Wheel Size

145/80R18 = 27.1X5.7R18
215/55R18 = 27.3x8.5R18
225/55R18 = 27.7x8.9R18
235/50R18 = 27.3x9.3R18
245/50R18 = 27.6x9.7R18
255/45R18 = 27x10R18
265/45R18 = 27.4x10.4R18
275/45R18 = 27.7x10.8R18
285/40R18 = 27x11.2R18
295/40R18 = 27.3x11.6R18
305/40R18 = 27.6X12R18
315/40R18 = 27.9x12.4R18
325/35R18 = 27x12.8R18
345/35R18 = 27.5x13.6R18

#### 19" Wheel Size

155/70R19 = 27.5x6.1R19
175/60R19 = 27.3x6.9R19
225/45R19 = 27x8.9R19
235/45R19 = 27.3x9.3R19
245/45R19 = 27.7x9.7R19
255/40R19 = 27x10R19
265/40R19 = 27.3x10.4R19
275/40R19 = 27.7x10.8R19
295/35R19 = 27.1x11.6R19
305/35R19 = 27.4X12R19
315/35R19 = 27.7x12.4R19
345/30R19 = 27.1x13.6R19
355/30R19 = 27.4x14R19

#### 20" Wheel Size

155/60R20 = 27.3x6.1R20
155/65R20 = 27.9X6.1R20
165/60R20 = 27.8X6.5R20
175/55R20 = 27.6x6.9R20
195/50R20 = 27.7x7.7R20
215/45R20 = 27.6x8.5R20
235/40R20 = 27.4x9.3R20
245/40R20 = 27.7x9.7R20
255/35R20 = 27x10R20
265/35R20 = 27x10.4R20
275/35R20 = 27.6x10.8R20
285/35R20 = 27.9x11.2R20
295/30R20 = 27x11.6R20
305/30R20 = 27.2x12R20
315/30R20 = 27.4x12.4R20
325/30R20 = 27.7x12.8R20
335/30R20 = 27.9x13.2R20

#### 21" Wheel Size

245/35R21 = 27.8x9.7R21
255/30R21 = 27x10R21
265/30R21 = 27.3x10.4R21
275/30R21 = 27.5x10.8R21
285/30R21 = 27.7x11.2R21
305/25R21 = 27x12R21
325/25R21 = 27.4x12.8R21

#### 22" Wheel Size

235/30R22 = 27.6x9.3R22
245/30R22 = 27.8x9.7R22
275/25R22 = 27.4x10.8R22
285/25R22 = 27.6x11.2R22
295/25R22 = 27.8x11.6R22

### 28" Diameter Gear Ratio Tire Size Conversion Chart

#### 15" Wheel Size

225/75R15 = 28.3x8.9R15
235/70R15 = 28x9.3R15
235/75R15 = 28.9x9.3R15
245/70R15 = 28.5X9.6R15
255/65R15 = 28.1x10R15
275/60R15 = 28x10.8R15
28X10.5R15
28X11.5R15
28X12.5R15
28X13.5R15
28X4.5R15
28X7.5R15
28X9R15

#### 16" Wheel Size

195/80R16 = 28.3x7.7R16
205/80R16 = 28.9x8.1R16
215/75R16 = 28.7x8.5R16
225/70R16 = 28.4x8.9R16
235/65R16 = 28x9.3R16
255/60R16 = 28x10R16
28X11.5R16

#### 17" Wheel Size

155/90R17 = 28X6.1R17
165/90R17 = 28.7X6.5R17
215/65R17 = 28x8.5R17
215/70R17 = 28.9x8.5R17
225/65R17 = 28.5x8.9R17
235/60R17 = 28.1x9.3R17
245/60R17 = 28.6X9.6R17
255/55R17 = 28x10R17
275/55R17 = 28.9x10.8R17

#### 18" Wheel Size

155/85R18 = 28.4X6.1R18
225/60R18 = 28.6x8.9R18
235/55R18 = 28.2x9.3R18
245/55R18 = 28.6x9.7R18
255/50R18 = 28x10R18
265/50R18 = 28.4X10.4R18
285/45R18 = 28.1x11.2R18
295/45R18 = 28.5x11.6R18
305/45R18 = 28.8X12R18

#### 19" Wheel Size

145/80R19 = 28.1X5.7R19
155/80R19 = 28.8X6.1R19
225/55R19 = 28.7x8.9R19
235/50R19 = 28.3x9.3R19
245/50R19 = 28.6x9.7R19
255/45R19 = 28x10R19
275/45R19 = 28.7x10.8R19
285/40R19 = 28x11.2R19
315/40R19 = 28.9x12.4R19
345/35R19 = 28.5x13.6R19

#### 20" Wheel Size

235/45R20 = 28.3x9.3R20
245/45R20 = 28.7x9.7R20
255/40R20 = 28x10R20
265/40R20 = 28x10.4R20
275/40R20 = 28.7x10.8R20
295/35R20 = 28.1x11.6R20
305/35R20 = 28.4x12R20
315/35R20 = 28.7x12.4R20
345/30R20 = 28.1x13.6R20

#### 21" Wheel Size

245/40R21 = 28.7x9.7R21
265/35R21 = 28.3x10.4R21
275/35R21 = 28.6x10.8R21
285/35R21 = 28.9x11.2R21
295/30R21 = 28x11.6R21
305/30R21 = 28.2x12R21
325/30R21 = 28.7x12.8R21
355/25R21 = 28x14R21

#### 22" Wheel Size

255/30R22 = 28x10R22
265/30R22 = 28.3x10.4R22
275/30R22 = 28.5X10.8R22
285/30R22 = 28.7x11.2R22
315/25R22 = 28.2x12.4R22
335/25R22 = 28.6x13.2R22

#### 23" Wheel Size

265/25R23 = 28.2X10.4R23

### 29" Diameter Gear Ratio Tire Size Conversion Chart

#### 16" Wheel Size

225/75R16 = 29.3x8.9R16
235/70R16 = 29x9.3R16
235/75R16 = 29.9x9.3R16
245/70R16 = 29.5x9.7R16
255/65R16 = 29.1x10R16
275/60R16 = 29X10.8R16
285/60R16 = 29.5X11.2R16

#### 17" Wheel Size

225/70R17 = 29.4x8.9R17
235/65R17 = 29x9.3R17
245/65R17 = 29.5x9.7R17
255/60R17 = 29x10R17
265/60R17 = 29.5x10.4R17

#### 18" Wheel Size

225/65R18 = 29.5X8.9R18
235/60R18 = 29.1x9.3R18
245/60R18 = 29.6x9.7R18
255/55R18 = 29x10R18
265/55R18 = 29.5X10.4R18
275/55R18 = 29.9x10.8R18
285/50R18 = 29.2x11.2R18

#### 19" Wheel Size

235/55R19 = 29.2x9.3R19
245/55R19 = 29.6x9.7R19
255/50R19 = 29x10R19
265/50R19 = 29.4x10.4R19
275/50R19 = 29.8X10.8R19
285/45R19 = 29.1x11.2R19
295/45R19 = 29.5x11.6R19

#### 20" Wheel Size

245/50R20 = 29.6x9.7R20
255/45R20 = 29x10R20
265/45R20 = 29.4x10.4R20
275/45R20 = 29.7x10.8R20
285/40R20 = 29x11.2R20
295/40R20 = 29.3x11.6R20

#### 21" Wheel Size

255/40R21 = 29X10R21
265/40R21 = 29.3x10.4R21
275/40R21 = 29.7x10.8R21
295/35R21 = 29.1x11.6R21

#### 22" Wheel Size

255/35R22 = 29x10R22
265/35R22 = 29.3x10.4R22
285/35R22 = 29.9x11.2R22
295/30R22 = 29x11.6R22
305/30R22 = 29.2x12R22
315/30R22 = 29.4X12.4R22

#### 24" Wheel Size

275/25R24 = 29.4x10.8R24

### 30" Diameter Gear Ratio Tire Size Conversion Chart

#### 15" Wheel Size

255/75R15 = 30.1x10R15
265/75R15 = 30.6x10.4R15
295/65R15 = 30.1x11.6R15
30X10.5R15
30X11.5R15
30X12.5R15
30X13.5R15
30X7R15
30X9R15
30X9.5R15

#### 16" Wheel Size

215/85R16 = 30.4x8.5R16
235/80R16 = 30.8x9.3R16
245/75R16 = 30.5x9.7R16
255/70R16 = 30.1x10R16
265/70R16 = 30.6x10.4R16
30X11.5R16

#### 17" Wheel Size

225/75R17 = 30.3x8.9R17
235/70R17 = 30x9.3R17
235/75R17 = 30.9x9.3R17
245/70R17 = 30.5x9.7R17
255/65R17 = 30.1x10R17
265/65R17 = 30.6x10.4R17
275/60R17 = 30x10.8R17
275/65R17 = 30.1x10.8R17
285/60R17 = 30.5X11.2R17

#### 18" Wheel Size

175/90R18 = 30.4X6.9R18
235/65R18 = 30x9.3R18
245/65R18 = 30.5x9.7R18
255/60R18 = 30x10R18
265/60R18 = 30.5x10.4R18
285/55R18 = 30.3x11.2R18

#### 19" Wheel Size

165/90R19 = 30.7X6.5R19
175/80R19 = 30X6.9R19
255/55R19 = 30x10R19
265/55R19 = 30.5x10.4R19
275/55R19 = 30.9x10.8R19

#### 20" Wheel Size

235/55R20 = 30.2x9.3R20
255/50R20 = 30x10R20
265/50R20 = 30.4x10.4R20
275/50R20 = 30.8x10.8R20
295/45R20 = 30.5x11.6R20
305/45R20 = 30.8x12R20

#### 21" Wheel Size

265/45R21 = 30.4x10.4R21
275/45R21 = 30.7X11.8R21
295/40R21 = 30.3x11.6R21

#### 22" Wheel Size

265/40R22 = 30.3x10.4R22
275/40R22 = 30.7x10.8R22

#### 23" Wheel Size

285/35R23 = 30.9x11.2R23

#### 24" Wheel Size

255/30R24 = 30x10R24
275/30R24 = 30.5x10.8R24
285/30R24 = 30.7x11.2R24

### 31" Diameter Gear Ratio Tire Size Conversion Chart

#### 16" Wheel Size

225/85R16 = 31.1X8.9R16
235/85R16 = 31.7x9.3R16
265/75R16 = 31.6x10.4R16
275/70R16 = 31.2x10.8R16
285/70R16 = 31.7x11.2R16
31X10.5R16
31X11R16
31X11.5R16
31X12.5R16

#### 17" Wheel Size

235/80R17 = 31.8x9.3R17
245/75R17 = 31.5x9.7R17
255/70R17 = 31.1x10R17
265/70R17 = 31.6x10.4R17
285/65R17 = 31.6x11.2R17
31X10.5R17

#### 18" Wheel Size

255/65R18 = 31.1x10R18
265/65R18 = 31.6x10.4R18
275/60R18 = 31x10.8R18
285/60R18 = 31.5x11.2R18

#### 19" Wheel Size

235/65R19 = 31X9.3R19
255/60R19 = 31x10R19

#### 20" Wheel Size

245/60R20 = 31.6x9.7R20
255/55R20 = 31x10R20
275/55R20 = 31.9x10.8R20
285/50R20 = 31.2x11.2R20
295/50R20 = 31.6x11.6R20
31X18R20

#### 21" Wheel Size

255/50R21 = 31x10R21
285/45R21 = 31.1x11.2R21

#### 22" Wheel Size

275/45R22 = 31.7x10.8R22
285/40R22 = 31x11.2R22
295/40R22 = 31.3x11.6R22
305/40R22 = 31.6x12R22

#### 24" Wheel Size

285/35R24 = 31.9x11.2R24

#### 26" Wheel Size

275/25R26 = 31.4x10.8R26
295/25R26 = 31.8x11.6R26

### 32" Diameter Gear Ratio Tire Size Conversion Chart

#### 16" Wheel Size

265/80R16 = 32.7X10.4R16
285/75R16 = 32.8x11.2R16
305/70R16 = 32.8x12R16
32X10R16
32X11.5R16
32X9R16

#### 17" Wheel Size

235/85R17 = 32.7X9.3R17
255/75R17 = 32.1x10R17
275/70R17 = 32.2x10.8R17
285/70R17 = 32.7x11.2R17
305/65R17 = 32.6x12R17
32X10.5R17
32X11.5R17

#### 18" Wheel Size

255/70R18 = 32.1x10R18
265/70R18 = 32.6x10.4R18
275/65R18 = 32.1x10.8R18
285/65R18 = 32.6x11.2R18
305/60R18 = 32.4x12R18

#### 20" Wheel Size

265/60R20 = 32.5x10.4R20
285/55R20 = 32.3x11.2R20
295/55R20 = 32.8X11.6R20
305/50R20 = 32x12R20
315/50R20 = 32.4x12.4R20
325/50R20 = 32.8x12.8R20

#### 22" Wheel Size

275/50R22 = 32.8x10.8R22
285/45R22 = 32.1x11.2R22
305/45R22 = 32.8x12R22

#### 23" Wheel Size

285/40R23 = 32x11.2R23
305/40R23 = 32.6x12R23

#### 24" Wheel Size

295/35R24 = 32.1x11.6R24
305/35R24 = 32.4x12R24
315/35R24 = 32.7x12.4R24
405/25R24 = 32x15.9R24

### 33" Diameter Gear Ratio Tire Size Conversion Chart

#### 16" Wheel Size

255/85R16 = 33.1x10R16
295/75R16 = 33.4x11.6R16
33X10.5R16
33X11.5R16
33X12.5R16
33X13R16
33X13.5R16
33X14R16
33X14.5R16
33.5X16.5R16

33X11.5R16.5
33X12.5R16.5
33X14R16.5
33X14.5R16.5
33X15.5R16.5

#### 17" Wheel Size

255/80R17 = 33.1x10R17
285/75R17 = 33.8x11.2R17
295/70R17 = 33.3x11.6R17
305/70R17 = 33.8x12R17
33X10.5R17
33X12.5R17
33X13R17
33X13.5R17

#### 18" Wheel Size

275/70R18 = 33.2x10.8R18
285/70R18 = 33.7x11.2R18
295/65R18 = 33.1x11.6R18
305/65R18 = 33.6x12R18
325/60R18 = 33.4x12.8R18
33X11.5R18
33X12.5R18
33X13.5R18

#### 20" Wheel Size

275/60R20 = 33x10.8R20
285/60R20 = 33.5x11.2R20
295/60R20 = 33.9X11.6R20
305/55R20 = 33.2x12R20
33X12.5R20
33X13.5R20

#### 22" Wheel Size

285/50R22 = 33.2x11.2R22
33X12.5R22

#### 24" Wheel Size

285/40R24 = 33x11.2R24
295/40R24 = 33.3x11.6R24

#### 26" Wheel Size

295/30R26 = 33x11.6R26
305/30R26 = 33.2x12R26

#### 28" Wheel Size

295/25R28 = 33.8x11.6R28

### 34" Diameter Gear Ratio Tire Size Conversion Chart

34X10.5R15
34X12.5R15
34X9.5R15

#### 16" Wheel Size

315/75R16 = 34.6x12.4R16
34X10.5R16
34X12.5R16
34X13.5R16
34X9R16
34.5X17R16

#### 17" Wheel Size

315/70R17 = 34.4x12.4R17
325/70R17 = 34.9x12.8R17
34X10.5R17

#### 18" Wheel Size

285/75R18 = 34.8x11.2R18
295/70R18 = 34.3X11.6R18
305/70R18 = 34.8x12R18
325/65R18 = 34.6x12.8R18

#### 20" Wheel Size

275/65R20 = 34.1x10.8R20
285/65R20 = 34.6x11.2R20
305/60R20 = 34.4x12R20
315/60R20 = 34.9x12.4R20
355/50R20 = 34X14R20

#### 22" Wheel Size

285/55R22 = 34.3X11.2R22
305/50R22 = 34x12R22
325/50R22 = 34.8x12.8R22

#### 24" Wheel Size

385/35R24 = 34.6x15.2R24

### 35" Diameter Gear Ratio Tire Size Conversion Chart

#### 16" Wheel Size

35X10.5R16
35X12.5R16
35X14.5R16
35X15R16
35X16R16
375/65R16 = 35.2x14.8R16

35X10.5R17
35X12.5R17
35X14.5R17

#### 18" Wheel Size

315/70R18 = 35.4x12.4R18
35X12.5R18
35X13.5R18
35X14.5R18

#### 20" Wheel Size

295/65R20 = 35.1X11.6R20
325/60R20 = 35.4x12.8R20
35X12.5R20
35X13.5R20
35X14.5R20

35X12.5R22
35X14.5R22

#### 24" Wheel Size

325/45R24 = 35.5x12.8R24

#### 26" Wheel Size

315/40R26 = 35.9x12.4R26

### 36" Diameter Gear Ratio Tire Size Conversion Chart

36X12.5R15
36X13.5R15
36X14.5R15

#### 16" Wheel Size

325/80R16 = 36.5x12.8R16
345/75R16 = 36.4x13.6R16
36X12.5R16
36X13R16
36X13.5R16
36X14.5R16

36X12.5R16.5
36X13.5R16.5
36X14.5R16.5
36X16R16.5

#### 17" Wheel Size

355/70R17 = 36.6x14R17
36X12.5R17
36X13.5R17

#### 18" Wheel Size

355/65R18 = 36.2x14R18
36X13.5R18

#### 20" Wheel Size

355/60R20 = 36.8x14R20
36X13.5R20
36X15.5R20

#### 22" Wheel Size

325/55R22 = 36.1x12.8R22
335/55R22 = 36.5X13.2R22

#### 24" Wheel Size

315/50R24 = 36.4X12.4R24

### 37" Diameter Gear Ratio Tire Size Conversion Chart

37X12.5R15
37X13R15
37X13.5R15
37X14R15
37X14.5R15

#### 16" Wheel Size

365/75R16 = 37.6x14.4R16
37X12.5R16
37X13R16
37X13.5R16
37X14R16
37X14.5R16
385/70R16 = 37.2x15.2R16
395/70R16 = 37.8x15.6R16

37X12.5R16.5
37X13R16.5
37X14R16.5

37X12.5R17
37X13R17
37X13.5R17
37X14R17

37X12.5R18
37X13.5R18

37X12.5R20
37X13.5R20

#### 22" Wheel Size

325/60R22 = 37.4x12.8R22
37X13.5R22

37X13.5R24

#### 28" Wheel Size

325/35R28 = 37x12.8R28

#### 30" Wheel Size

315/30R30 = 37.4x12.4R30

### 38" Diameter Gear Ratio Tire Size Conversion Chart

38X13.5R17
38X14.5R17
38X15.5R17
38.5X14.5R17

38X13.5R18
38X14.5R18
38X15R18
38X15.5R18
38.5X14.5R18

38X13.5R20
38X14.5R20
38X15.5R20
38.5X14.5R20

#### 22" Wheel Size

355/60R22 = 38.8x14R22

38X13.5R24
38X14R24

39X13.5R15
39.5X13.5R15
39.5X15R15
39.5X18R15

39X13.5R16
39.5X13.5R16
39.5X15R16

39X13.5R16.5
39.5X13.5R16.5
39.5X15R16.5
39.5X18R16.5

39X13.5R17
39.5X13.5R17
39.5X15R17

39X13.5R20
39.5X13.5R20
39.5X15R20

40X16R15

40X16R16

40X13.5R17
40X14.5R17
40X16R17

40X13.5R18
40X14.5R18

40X14.5R20
40X15.5R20

40X14.5R22
40X15.5R22

40X14.5R24