EXAMPLE : P255/60R17 102 V

P - Passenger Vehicle
LT - Light Truck
C - Commercial Vehicle
255 - Width of the tire is 255mm.
60 - The aspect ratio of the tire is 60%. The tire's sidewall height from the edge of the wheel to the tire's tread is 60% of the width.
R - This letter is for how the tire is constructed. Radial is the standard construction method for almost all tires.
R - Radial
B - Bias Belt
D - Diagonal
17 - The tire is designed to be mounted on an 17" wheel diameter.
102 - This number is the load index. Ranging between 71 and 110 a higher number means the tire can carry more weight.
71 = 761lbs 110 = 2337lbs
V - This letter is the speed rating of the tire.

Load Ratings

Load Index Pounds Kilograms
Load Index Pounds Kilograms
71 761 345 91 1356 615
72 783 355 92 1389 630
73 805 365 93 1433 650
74 827 375 94 1477 670
75 853 387 95 1521 690
76 882 400 96 1565 710
77 908 412 97 1609 730
78 937 425 98 1653 750
79 963 437 99 1709 775
80 992 450 100 1764 800
81 1019 462 101 1819 825
82 1047 475 102 1874 850
83 1074 487 103 1929 875
84 1102 500 104 1984 900
85 1135 515 105 2039 925
86 1168 530 106 2094 950
87 1201 545 107 2149 975
88 1235 560 108 2205 1000
89 1279 580 109 2271 1030
90 1323 600 110 2337 1060


Load Range

Load RangePly RatingAbbreviatedMax Load Pressure
B4B35 psi (240 kPa)***
C6C50 psi (350 kPa)***
D8D65 psi (450 kPa)***
E10E80 psi (550 kPa)***
F12F95 psi (650 kPa)***


Speed Ratings

L75 mph120 km/hOff-Road & Light Truck Tires
M81 mph130 km/hTemporary Spare Tires
N87 mph140km/h
P93 mph150 km/h
Q99 mph160 km/hStudless & Studdable Winter Tires
R106 mph170 km/hH.D. Light Truck Tires
S112 mph180 km/hFamily Sedans & Vans
T118 mph190 km/hFamily Sedans & Vans
U124 mph200 km/h
H130 mph210 km/hSport Sedans & Coupes
V149 mph240 km/hSport Sedans, Coupes & Sports Cars
W168 mph270 km/hExotic Sports Cars
Y186 mph300 km/hExotic Sports Cars


Converting Metric to Inches

There are two ways that tire manufacturers display tire size, inches and metric. How to read tire size in inches is very straight forward. Example A : 33X12.50R15 The first number is your overall diameter of the tire. In this example the tire diameter or "height" is 33 inches tall. The second number represents the width of the tire. In most cases with inch measurement tires the width will have a .50 decimal after the initial number. In example "A" this reads 12.50, meaning the tire width is 12 and 1/2 inches. The final number simply is the wheel size or "diameter" of the wheel that the tire will fit on.

How to read tire size with a metric measurement is a little more difficult and usually takes a calculator to get exactly right.

Learn About Tire Sizes

how to read tire size Example B : 285/75R16

On metric tires the first number is your width of the tire in millimeters. In example "B" this reads 285mm. There are 25.4 mm in one inch. To convert 285mm to inches you divide 285mm by 25.4 to get 11.22in. So your width of a 285mm tire is 11.22 inches. The next number then represents the percentage of the width (285mm or 11.22in) that is the sidewall measurement of the tire. In this example the side wall measurement of the tire would be 75% of 11.22in which is 8.41 inches or "214mm". To then get the overall diameter or "height" of the tire you would add the two sidewalls and the diameter of the wheel. In example "B" the last number "16" is the wheel size the tire will fit on. Therefore the sidewall twice would be 8.41 x 2 = 16.82 plus the wheel "16" makes the tire height 16.82 + 16 = 32.82. So a 285/75R16 metric tire would calculate to an inch measurement tire of 32.82X11.22R16. Remember, not all tire sizes are manufactured in both metric and inch sizes so learning how to read tire size can be a valuable tool for anyone in the market for new tires.

How to Read Tire Size Charts by Wheel Size

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

How to Read Tire Size Chart for 13" Wheels

155/80R13 = 22.8X6.1R13
175/70R13 = 22.6X6.9R13
175/80R13 = 24X6.9R13
185/60R13 = 21.7X7.3R13
185/70R13 = 23.2X7.3R13
185/80R13 = 24.7X7.3R13
205/60R13 = 22.7X8.1R13
215/50R13 = 21.5X8.50R13
225/45R13 = 21X8.9R13
225/50R13 = 21.9X8.9R13
255/40R13 = 21X10R13

How to Read Tire Size Chart for 14" Wheels

165/65R14 = 22.4X6.50R14
175/65R14 = 23X6.9R14
175/70R14 = 23.6X6.9R14
185/55R14 = 22X7.3R14
185/60R14 = 22.7X7.3R14
185/65R14 = 23.5X7.3R14
185/70R14 = 24.2X7.3R14
195/55R14 = 22.4X7.7R14
195/60R14 = 23.2X7.7R14
195/65R14 = 24X7.7R14
195/70R14 = 24.7X7.7R14
195/75R14 = 25.5X7.7R14
205/50R14 = 22.1X8.1R14
205/55R14 = 22.9X8.1R14
205/60R14 = 23.7X8.1R14
205/70R14 = 25.3X8.1R14
205/75R14 = 26.1X8.1R14
215/60R14 = 24.2X8.50R14
215/70R14 = 25.9X8.50R14
215/75R14 = 26.7X8.50R14
225/50R14 = 22.9X8.9R14
225/60R14 = 24.6X8.9R14
225/70R14 = 26.4X8.9R14
225/85R14 = 29.1X8.7R14
235/60R14 = 25.1X9.3R14
245/60R14 = 25.6X9.7R14
27X9.50R14
28X8.50R14

Tire Conversion Chart for 15" Wheels

145/65R15 = 22.4X5.7R15
155/60R15 = 22.3X6.1R15
165/60R15 = 22.8X6.50R15
175/55R15 = 22.6X6.9R15
175/60R15 = 23.3X6.9R15
175/65R15 = 24X6.9R15
185/55R15 = 23X7.3R15
185/60R15 = 23.7X7.3R15
185/65R15 = 24.5X7.3R15
195/45R15 = 21.9X7.7R15
195/50R15 = 22.7X7.7R15
195/55R15 = 23.4X7.7R15
195/60R15 = 24.2X7.7R15
195/65R15 = 25X7.7R15
195/70R15 = 25.7X7.7R15
205/50R15 = 23.1X8.1R15
205/55R15 = 23.9X8.1R15
205/60R15 = 24.7X8.1R15
205/65R15 = 25.5X8.1R15
205/70R15 = 26.3X8.1R15
205/75R15 = 27.1X8.1R15
215/60R15 = 25.2X8.50R15
215/65R15 = 26X8.50R15
215/70R15 = 26.9X8.50R15
215/75R15 = 27.7X8.50R15
215/85R15 = 29.4X8.50R15
225/45R15 = 23X8.9R15
225/50R15 = 23.9X8.9R15
225/55R15 = 24.7X8.9R15
225/60R15 = 25.6X8.9R15
225/70R15 = 27.4X8.9R15
225/75R15 = 28.3X8.9R15
235/50R15 = 24.3X9.3R15
235/60R15 = 26.1X9.3R15
235/70R15 = 28X9.3R15
235/75R15 = 28.9X9.3R15
245/50R15 = 24.6X9.7R15
245/60R15 = 26.6X9.7R15
255/60R15 = 27X10R15
255/65R15 = 28.1X10R15
255/70R15 = 29.1X10R15
255/75R15 = 30.1X10R15
265/70R15 = 29.6X10.4R15
265/75R15 = 30.6X10.4R15
275/35R15 = 22.6X10.8R15
275/50R15 = 25.8X10.8R15
275/60R15 = 28X10.8R15
295/50R15 = 26.6X11.6R15
295/65R15 = 30.1X11.6R15
315/60R15 = 29.9X12.4R15
325/50R15 = 27.8X12.8R15
345/35R15 = 24.5X13.6R15
27X9.50R15
29X10.50R15
29X11.50R15
29X8.50R15
30X10.50R15

How to Read Tire Size Chart for 16" Wheels

175/50R16 = 22.9X6.9R16
175/55R16 = 23.6X6.9R16
175/60R16 = 24.3X6.9R16
185/55R16 = 24X7.3R16
195/40R16 = 22.1X7.7R16
195/45R16 = 22.9X7.7R16
195/50R16 = 23.7X7.7R16
195/55R16 = 24.4X7.7R16
195/60R16 = 25.2X7.7R16
195/80R16 = 28.3X7.7R16
205/40R16 = 22.5X8.1R16
205/45R16 = 23.3X8.1R16
205/50R16 = 24.1X8.1R16
205/55R16 = 24.9X8.1R16
205/60R16 = 25.7X8.1R16
205/65R16 = 26.5X8.1R16
205/70R16 = 27.3X8.1R16
205/80R16 = 28.9X8.1R16
215/35R16 = 21.9X8.50R16
215/40R16 = 22.8X8.50R16
215/45R16 = 23.6X8.50R16
215/50R16 = 24.5X8.50R16
215/55R16 = 25.3X8.50R16
215/60R16 = 26.2X8.50R16
215/65R16 = 27X8.50R16
215/70R16 = 27.9X8.50R16
215/75R16 = 28.7X8.50R16
215/85R16 = 30.4X8.50R16
225/45R16 = 24X8.9R16
225/50R16 = 24.9X8.9R16
225/55R16 = 25.7X8.9R16
225/60R16 = 26.6X8.9R16
225/65R16 = 27.5X8.9R16
225/70R16 = 28.4X8.9R16
225/75R16 = 29.3X8.9R16
235/55R16 = 26.2X9.3R16
235/60R16 = 27.1X9.3R16
235/65R16 = 28X9.3R16
235/70R16 = 29X9.3R16
235/75R16 = 29.9X9.3R16
235/80R16 = 30.8X9.3R16
235/85R16 = 31.7X9.3R16
245/45R16 = 24.7X9.7R16
245/50R16 = 25.6X9.7R16
245/70R16 = 29.5X9.7R16
245/75R16 = 30.5X9.7R16
255/50R16 = 26X10R16
255/60R16 = 28X10R16
255/65R16 = 29.1X10R16
255/70R16 = 30.1X10R16
255/85R16 = 33.1X10R16
265/70R16 = 30.6X10.4R16
265/75R16 = 31.6X10.4R16

How to Read Tire Size Chart for 17" Wheels

195/40R17 = 23.1X7.7R17
195/45R17 = 23.9X7.7R17
205/40R17 = 23.5X8.1R17
205/45R17 = 24.3X8.1R17
205/50R17 = 25.1X8.1R17
205/55R17 = 25.9X8.1R17
215/35R17 = 22.9X8.50R17
215/40R17 = 23.8X8.50R17
215/45R17 = 24.6X8.50R17
215/50R17 = 25.5X8.50R17
215/55R17 = 26.3X8.50R17
215/60R17 = 27.2X8.50R17
215/65R17 = 28X8.50R17
215/70R17 = 28.9X8.50R17
225/35R17 = 23.2X8.9R17
225/40R17 = 24.1X8.9R17
225/45R17 = 25X8.9R17
225/50R17 = 25.9X8.9R17
225/55R17 = 26.7X8.9R17
225/60R17 = 27.6X8.9R17
225/65R17 = 28.5X8.9R17
225/70R17 = 29.4X8.9R17
225/75R17 = 30.3X8.9R17
235/40R17 = 24.4X9.3R17
235/45R17 = 25.3X9.3R17
235/50R17 = 26.3X9.3R17
235/55R17 = 27.2X9.3R17
235/60R17 = 28.1X9.3R17
235/65R17 = 29X9.3R17
235/70R17 = 30X9.3R17
235/75R17 = 30.9X9.3R17
235/80R17 = 31.8X9.3R17
245/35R17 = 23.8X9.7R17
245/40R17 = 24.7X9.7R17
245/45R17 = 25.7X9.7R17
245/50R17 = 26.6X9.7R17
245/55R17 = 27.6X9.7R17
245/65R17 = 29.5X9.7R17
245/70R17 = 30.5X9.7R17
245/75R17 = 31.5X9.7R17
255/40R17 = 25X10R17
255/45R17 = 26X10R17
255/50R17 = 27X10R17
255/55R17 = 28X10R17
255/60R17 = 29X10R17
255/65R17 = 30.1X10R17
255/70R17 = 31.1X10R17
255/75R17 = 32.1X10R17
255/80R17 = 33.1X10R17
265/40R17 = 25.3X10.4R17
265/60R17 = 29.5X10.4R17
265/65R17 = 30.6X10.4R17
265/70R17 = 31.6X10.4R17
275/35R17 = 24.6X10.8R17

How to Read Tire Size Chart for 18" Wheels

205/40R18 = 24.5X8.1R18
215/35R18 = 23.9X8.50R18
215/40R18 = 24.8X8.50R18
215/45R18 = 25.6X8.50R18
215/55R18 = 27.3X8.50R18
225/35R18 = 24.2X8.9R18
225/40R18 = 25.1X8.9R18
225/45R18 = 26X8.9R18
225/50R18 = 26.9X8.9R18
225/55R18 = 27.7X8.9R18
225/60R18 = 28.6X8.9R18
235/35R18 = 24.5X9.3R18
235/40R18 = 25.4X9.3R18
235/45R18 = 26.3X9.3R18
235/50R18 = 27.3X9.3R18
235/55R18 = 28.2X9.3R18
235/60R18 = 29.1X9.3R18
235/65R18 = 30X9.3R18
245/35R18 = 24.8X9.7R18
245/40R18 = 25.7X9.7R18
245/45R18 = 26.7X9.7R18
245/50R18 = 27.6X9.7R18
245/55R18 = 28.6X9.7R18
245/60R18 = 29.6X9.7R18
245/65R18 = 30.5X9.7R18
255/35R18 = 25X10R18
255/40R18 = 26X10R18
255/45R18 = 27X10R18
255/50R18 = 28X10R18
255/55R18 = 29X10R18
255/60R18 = 30X10R18
255/65R18 = 31.1X10R18
255/70R18 = 32.1X10R18
265/35R18 = 25.3X10.4R18
265/40R18 = 26.3X10.4R18
265/45R18 = 27.4X10.4R18
265/60R18 = 30.5X10.4R18
265/65R18 = 31.6X10.4R18
265/70R18 = 32.6X10.4R18
275/35R18 = 25.6X10.8R18
275/40R18 = 26.7X10.8R18
275/45R18 = 27.7X10.8R18
275/55R18 = 29.9X10.8R18
275/60R18 = 31X10.8R18
275/65R18 = 32.1X10.8R18
275/70R18 = 33.2X10.8R18
285/30R18 = 24.7X11.2R18
285/35R18 = 25.9X11.2R18
285/40R18 = 27X11.2R18
285/45R18 = 28.1X11.2R18
285/50R18 = 29.2X11.2R18
285/55R18 = 30.3X11.2R18
285/60R18 = 31.5X11.2R18
285/65R18 = 32.6X11.2R18
285/70R18 = 33.7X11.2R18
285/75R18 = 34.8X11.2R18
295/30R18 = 25X11.6R18
295/35R18 = 26.1X11.6R18
295/40R18 = 27.3X11.6R18
295/45R18 = 28.5X11.6R18
295/65R18 = 33.1X11.6R18
305/30R18 = 25.2X12R18
305/35R18 = 26.4X12R18
305/60R18 = 32.4X12R18
305/65R18 = 33.6X12R18
305/70R18 = 34.8X12R18
315/30R18 = 25.4X12.4R18
315/35R18 = 26.7X12.4R18
315/40R18 = 27.9X12.4R18
325/60R18 = 33.4X12.8R18
325/65R18 = 34.6X12.8R18
335/30R18 = 25.9X13.2R18
345/30R18 = 26.1X13.6R18
345/35R18 = 27.5X13.6R18
355/65R18 = 36.2X14R18
33X12.50R18
33X13.50R18
35X12.50R18
35X14.50R18
36X13.50R18
37X12.50R18
37X13.50R18
38X13.50R18
38X14.50R18
38X15.50R18
38.5X14.50R18
40X13.50R18
40X14.50R18
41X14.50R18

How to Read Tire Size Chart for 19" Wheels

215/35R19 = 24.9X8.50R19
225/35R19 = 25.2X8.9R19
225/40R19 = 26.1X8.9R19
225/45R19 = 27X8.9R19
225/55R19 = 28.7X8.9R19
235/30R19 = 24.6X9.3R19
235/35R19 = 25.5X9.3R19
235/40R19 = 26.4X9.3R19
235/45R19 = 27.3X9.3R19
235/50R19 = 28.3X9.3R19
235/55R19 = 29.2X9.3R19
245/30R19 = 24.8X9.7R19
245/35R19 = 25.8X9.7R19
245/40R19 = 26.7X9.7R19
245/45R19 = 27.7X9.7R19
245/50R19 = 28.6X9.7R19
245/55R19 = 29.6X9.7R19
255/30R19 = 25X10R19
255/35R19 = 26X10R19
255/40R19 = 27X10R19
255/45R19 = 28X10R19
255/50R19 = 29X10R19
255/55R19 = 30X10R19
255/60R19 = 31X10R19
265/30R19 = 25.3X10.4R19
265/35R19 = 26.3X10.4R19
265/40R19 = 27.3X10.4R19
265/50R19 = 29.4X10.4R19
265/55R19 = 30.5X10.4R19
275/30R19 = 25.5X10.8R19
275/35R19 = 26.6X10.8R19
275/40R19 = 27.7X10.8R19
275/45R19 = 28.7X10.8R19
275/55R19 = 30.9X10.8R19
285/30R19 = 25.7X11.2R19
285/35R19 = 26.9X11.2R19
285/40R19 = 28X11.2R19
285/45R19 = 29.1X11.2R19
295/30R19 = 26X11.6R19
295/35R19 = 27.1X11.6R19
295/45R19 = 29.5X11.6R19
305/30R19 = 26.2X12R19
315/25R19 = 25.2X12.4R19
315/30R19 = 26.4X12.4R19
315/35R19 = 27.7X12.4R19
315/40R19 = 28.9X12.4R19
325/30R19 = 26.7X12.8R19
335/30R19 = 26.9X13.2R19
345/30R19 = 27.1X13.6R19
345/35R19 = 28.5X13.6R19

How to Read Tire Size Chart for 20" Wheels

225/30R20 = 25.3X8.9R20
225/35R20 = 26.2X8.9R20
235/30R20 = 25.6X9.3R20
235/35R20 = 26.5X9.3R20
235/45R20 = 28.3X9.3R20
235/55R20 = 30.2X9.3R20
245/30R20 = 25.8X9.7R20
245/35R20 = 26.8X9.7R20
245/40R20 = 27.7X9.7R20
245/45R20 = 28.7X9.7R20
245/50R20 = 29.6X9.7R20
245/60R20 = 31.6X9.7R20
255/30R20 = 26X10R20
255/35R20 = 27X10R20
255/40R20 = 28X10R20
255/45R20 = 29X10R20
255/50R20 = 30X10R20
255/55R20 = 31X10R20
265/30R20 = 26X10.4R20
265/35R20 = 27X10.4R20
265/40R20 = 28X10.4R20
265/45R20 = 29X10.4R20
265/50R20 = 30X10.4R20
265/60R20 = 32X10.4R20
275/30R20 = 26.5X10.8R20
275/35R20 = 27.6X10.8R20
275/40R20 = 28.7X10.8R20
275/45R20 = 29.7X10.8R20
275/50R20 = 30.8X10.8R20
275/55R20 = 31.9X10.8R20
275/60R20 = 33X10.8R20
275/65R20 = 34.1X10.8R20
285/25R20 = 25.6X11.2R20
285/30R20 = 26.7X11.2R20
285/35R20 = 27.9X11.2R20
285/40R20 = 29X11.2R20
285/50R20 = 31.2X11.2R20
285/55R20 = 32.3X11.2R20
285/60R20 = 33.5X11.2R20
285/65R20 = 34.6X11.2R20
295/25R20 = 25.8X11.6R20
295/30R20 = 27X11.6R20
295/35R20 = 28.1X11.6R20
295/40R20 = 29.3X11.6R20
295/45R20 = 30.5X11.6R20
295/50R20 = 31.6X11.6R20
305/25R20 = 26X12R20
305/30R20 = 27.2X12R20
305/35R20 = 28.4X12R20
305/45R20 = 30.8X12R20
305/50R20 = 32X12R20
305/55R20 = 33.2X12R20
305/60R20 = 34.4X12R20
315/25R20 = 26.2X12.4R20
315/30R20 = 27.4X12.4R20
315/35R20 = 28.7X12.4R20
315/50R20 = 32.4X12.4R20
325/25R20 = 26.4X12.8R20
325/30R20 = 27.7X12.8R20
325/50R20 = 32.8X12.8R20
325/60R20 = 35.4X12.8R20
335/25R20 = 26.6X13.2R20
335/30R20 = 27.9X13.2R20
345/30R20 = 28.1X13.6R20
355/60R20 = 36.8X14R20
33X12.50R20
33X13.50R20
35X12.50R20
35X14.50R20
36X13.50R20
37X12.50R20
37X13.50R20
38X14.50R20
38X15.50R20
38.5X14.50R20
39.5X13.50R20
39.5X15R20
40X14.50R20
40X15.50R20
41X14.50R20
42X14.50R20
42X15R20
42.5X13.50R20
43X14.50R20
44X19.50R20
44X21R20
49X21R20
54X19.50R20

How to Read Tire Size Chart for 21" Wheels

245/30R21 = 26.8X9.7R21
245/35R21 = 27.8X9.7R21
245/40R21 = 28.7X9.7R21
255/30R21 = 27X10R21
255/50R21 = 31X10R21
265/30R21 = 27.3X10.4R21
265/35R21 = 28.3X10.4R21
265/40R21 = 29.3X10.4R21
265/45R21 = 30.4X10.4R21
275/30R21 = 27.5X10.8R21
275/35R21 = 28.6X10.8R21
275/40R21 = 29.7X10.8R21
285/30R21 = 27.7X11.2R21
285/35R21 = 28.9X11.2R21
285/45R21 = 31.1X11.2R21
295/25R21 = 26.8X11.6R21
295/30R21 = 28X11.6R21
295/35R21 = 29.1X11.6R21
295/40R21 = 30.3X11.6R21
305/30R21 = 28.2X12R21
325/30R21 = 28.7X12.8R21
355/25R21 = 28X14R21

How to Read Tire Size Chart for 22" Wheels

235/30R22 = 27.6X9.3R22
245/30R22 = 27.8X9.7R22
255/30R22 = 28X10R22
255/35R22 = 29X10R22
265/30R22 = 28.3X10.4R22
265/35R22 = 29.3X10.4R22
265/40R22 = 30.3X10.4R22
275/25R22 = 27.4X10.8R22
275/40R22 = 30.7X10.8R22
275/45R22 = 31.7X10.8R22
275/50R22 = 32.8X10.8R22
285/25R22 = 27.6X11.2R22
285/30R22 = 28.7X11.2R22
285/35R22 = 29.9X11.2R22
285/40R22 = 31X11.2R22
285/45R22 = 32.1X11.2R22
295/25R22 = 27.8X11.6R22
295/30R22 = 29X11.6R22
295/40R22 = 31.3X11.6R22
305/30R22 = 29.2X12R22
305/40R22 = 31.6X12R22
305/45R22 = 32.8X12R22
315/25R22 = 28.2X12.4R22
325/50R22 = 34.8X12.8R22
325/55R22 = 36.1X12.8R22
325/60R22 = 37.4X12.8R22
335/25R22 = 28.6X13.2R22
33X12.50R22
35X12.50R22
35X14.50R22
37X13.50R22
40X14.50R22
41X14.50R22
42.5X13.50R22

How to Read Tire Size Chart for 23" Wheels

285/35R23 = 30.9X11.2R23
285/40R23 = 32X11.2R23
305/40R23 = 32.6X12R23

How to Read Tire Size Chart for 24" Wheels

255/30R24 = 30X10R24
275/25R24 = 29.4X10.8R24
275/30R24 = 30.5X10.8R24
285/30R24 = 30.7X11.2R24
285/35R24 = 31.9X11.2R24
285/40R24 = 33X11.2R24
295/35R24 = 32.1X11.6R24
295/40R24 = 33.3X11.6R24
305/35R24 = 32.4X12R24
315/35R24 = 32.7X12.4R24
385/35R24 = 34.6X15.2R24
405/25R24 = 32X15.9R24
37X13.50R24
40X14.50R24

How to Read Tire Size Chart for 26" Wheels

275/25R26 = 31.4X10.8R26
295/25R26 = 31.8X11.6R26
295/30R26 = 33X11.6R26
305/30R26 = 33.2X12R26
315/40R26 = 35.9X12.4R26

How to Read Tire Size Chart for 28" Wheels

295/25R28 = 33.8X11.6R28
325/35R28 = 37X12.8R28

How to Read Tire Size 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 Tire Conversion Chart

185/60R13 = 21.7X7.3R13
215/50R13 = 21.5X8.50R13
225/45R13 = 21X8.9R13
255/40R13 = 21X10R13
225/50R13 = 21.9X8.9R13
195/45R15 = 21.9X7.7R15

22" Diameter Tire Conversion Chart

155/80R13 = 22.8X6.1R13
175/70R13 = 22.6X6.9R13
205/60R13 = 22.7X8.1R13
165/65R14 = 22.4X6.50R14
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
145/65R15 = 22.4X5.7R15
155/60R15 = 22.3X6.1R15
165/60R15 = 22.8X6.50R15
175/55R15 = 22.6X6.9R15
195/50R15 = 22.7X7.7R15
275/35R15 = 22.6X10.8R15
175/50R16 = 22.9X6.9R16
195/40R16 = 22.1X7.7R16
195/45R16 = 22.9X7.7R16
205/40R16 = 22.5X8.1R16
215/35R16 = 22X8.50R16
215/40R16 = 22.8X8.50R16

23" Diameter Tire Conversion Chart

185/70R13 = 23.2X7.3R13
175/65R14 = 23X6.9R14
175/70R14 = 23.6X6.9R14
185/65R14 = 23.5X7.3R14
195/60R14 = 23.2X7.7R14
205/60R14 = 23.7X8.1R14
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
175/55R16 = 23.6X6.9R16
195/50R16 = 23.7X7.7R16
205/45R16 = 23.3X8.1R16
215/45R16 = 23.6X8.50R16
195/40R17 = 23.1X7.7R17
195/45R17 = 23.9X7.7R17
205/40R17 = 23.5X8.1R17
215/35R17 = 23X8.50R17
215/40R17 = 23.8X8.50R17
225/35R17 = 23.2X8.9R17
245/35R17 = 23.8X9.7R17
215/35R18 = 23.9X8.50R18

24" Diameter Tire Conversion Chart

175/80R13 = 24X6.9R13
185/80R13 = 24.7X7.3R13
185/70R14 = 24.2X7.3R14
195/65R14 = 24X7.7R14
195/70R14 = 24.7X7.7R14
215/60R14 = 24.2X8.50R14
225/60R14 = 24.6X8.9R14
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
245/50R15 = 24.6X9.7R15
345/35R15 = 24.5X13.6R15
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 = 24.5X8.50R16
225/45R16 = 24X8.9R16
225/50R16 = 24.9X8.9R16
245/45R16 = 24.7X9.7R16
205/45R17 = 24.3X8.1R17
215/45R17 = 24.6X8.50R17
225/40R17 = 24.1X8.9R17
235/40R17 = 24.4X9.3R17
245/40R17 = 24.7X9.7R17
275/35R17 = 24.6X10.8R17
205/40R18 = 24.5X8.1R18
215/40R18 = 24.8X8.50R18
225/35R18 = 24.2X8.9R18
235/35R18 = 24.5X9.3R18
245/35R18 = 24.8X9.7R18
285/30R18 = 24.7X11.2R18
215/35R19 = 24.9X8.50R19
235/30R19 = 24.6X9.3R19
245/30R19 = 24.8X9.7R19

25" Diameter Tire Conversion Chart

195/75R14 = 25.5X7.7R14
205/70R14 = 25.3X8.1R14
215/70R14 = 25.9X8.50R14
235/60R14 = 25.1X9.3R14
245/60R14 = 25.6X9.7R14
195/65R15 = 25X7.7R15
195/70R15 = 25.7X7.7R15
205/65R15 = 25.5X8.1R15
215/60R15 = 25.2X8.50R15
225/60R15 = 25.6X8.9R15
275/50R15 = 25.8X10.8R15
195/60R16 = 25.2X7.7R16
205/60R16 = 25.7X8.1R16
215/55R16 = 25.3X8.50R16
225/55R16 = 25.7X8.9R16
245/50R16 = 25.6X9.7R16
275/45R16 = 25.7X10.8R16
205/50R17 = 25.1X8.1R17
205/55R17 = 25.9X8.1R17
215/50R17 = 25.5X8.50R17
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
215/45R18 = 25.6X8.50R18
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
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
225/30R20 = 25.3X8.9R20
235/30R20 = 25.6X9.3R20
245/30R20 = 25.8X9.7R20
285/25R20 = 25.6X11.2R20
295/25R20 = 25.8X11.6R20

26" Diameter Tire Conversion Chart

205/75R14 = 26.1X8.1R14
215/75R14 = 26.7X8.50R14
225/70R14 = 26.4X8.9R14
205/70R15 = 26.3X8.1R15
215/65R15 = 26X8.50R15
215/70R15 = 26.9X8.50R15
235/60R15 = 26.1X9.3R15
245/60R15 = 26.6X9.7R15
295/50R15 = 26.6X11.6R15
205/65R16 = 26.5X8.1R16
215/60R16 = 26.2X8.50R16
225/60R16 = 26.6X8.9R16
235/55R16 = 26.2X9.3R16
255/50R16 = 26X10R16
215/55R17 = 26.3X8.50R17
225/55R17 = 26.7X8.9R17
235/50R17 = 26.3X9.3R17
245/50R17 = 26.6X9.7R17
255/45R17 = 26X10R17
285/40R17 = 26X11.2R17
295/40R17 = 26.3X11.6R17
335/35R17 = 26.2X13.2R17
225/45R18 = 26X8.9R18
225/50R18 = 26.9X8.9R18
235/45R18 = 26.3X9.3R18
245/45R18 = 26.7X9.7R18
255/40R18 = 26X10R18
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
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
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
245/30R21 = 26.8X9.7R21
295/25R21 = 26.8X11.6R21

27" Diameter Tire Conversion Chart

205/75R15 = 27.1X8.1R15
215/75R15 = 27.7X8.50R15
225/70R15 = 27.4X8.9R15
255/60R15 = 27X10R15
325/50R15 = 27.8X12.8R15
205/70R16 = 27.3X8.1R16
215/65R16 = 27X8.50R16
215/70R16 = 27.9X8.50R16
225/65R16 = 27.5X8.9R16
235/60R16 = 27.1X9.3R16
215/60R17 = 27.2X8.50R17
225/60R17 = 27.6X8.9R17
235/55R17 = 27.2X9.3R17
245/55R17 = 27.6X9.7R17
255/50R17 = 27X10R17
345/40R17 = 27.9X13.6R17
215/55R18 = 27.3X8.50R18
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
315/40R18 = 27.9X12.4R18
345/35R18 = 27.5X13.6R18
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
315/35R19 = 27.7X12.4R19
345/30R19 = 27.1X13.6R19
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
245/35R21 = 27.8X9.7R21
255/30R21 = 27X10R21
265/30R21 = 27.3X10.4R21
275/30R21 = 27.5X10.8R21
285/30R21 = 27.7X11.2R21
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
27X8.50R14
27X9.50R14
27X9.50R15

28" Diameter Tire Conversion Chart

225/85R14 = 29.1X8.7R14
225/75R15 = 28.3X8.9R15
235/70R15 = 28X9.3R15
235/75R15 = 28.9X9.3R15
255/65R15 = 28.1X10R15
275/60R15 = 28X10.8R15
195/80R16 = 28.3X7.7R16
205/80R16 = 28.9X8.1R16
215/75R16 = 28.7X8.50R16
225/70R16 = 28.4X8.9R16
235/65R16 = 28X9.3R16
255/60R16 = 28X10R16
215/65R17 = 28X8.50R17
215/70R17 = 28.9X8.50R17
225/65R17 = 28.5X8.9R17
235/60R17 = 28.1X9.3R17
255/55R17 = 28X10R17
275/55R17 = 28.9X10.8R17
225/60R18 = 28.6X8.9R18
235/55R18 = 28.2X9.3R18
245/55R18 = 28.6X9.7R18
255/50R18 = 28X10R18
285/45R18 = 28.1X11.2R18
295/45R18 = 28.5X11.6R18
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
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
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
255/30R22 = 28X10R22
265/30R22 = 28.3X10.4R22
285/30R22 = 28.7X11.2R22
315/25R22 = 28.2X12.4R22
335/25R22 = 28.6X13.2R22
28X8.50R14

29" Diameter Tire Conversion Chart

225/85R14 = 29.1X8.7R14
215/85R15 = 29.4X8.50R15
255/70-15 = 29.1X10R15
265/70R15 = 29.6X10.4R15
315/60R15 = 29.9X12.4R15
225/75R16 = 29.3X8.9R16
235/70R16 = 29X9.3R16
235/75R16 = 29.9X9.3R16
245/70R16 = 29.5X9.7R16
255/65R16 = 29.1X10R16
225/70R17 = 29.4X8.9R17
235/65R17 = 29X9.3R17
245/65R17 = 29.5X9.7R17
255/60R17 = 29X10R17
265/60R17 = 29.5X10.4R17
235/60R18 = 29.1X9.3R18
245/60R18 = 29.6X9.7R18
255/55R18 = 29X10R18
275/55R18 = 29.9X10.8R18
285/50R18 = 29.2X11.2R18
235/55R19 = 29.2X9.3R19
245/55R19 = 29.6X9.7R19
255/50R19 = 29X10R19
265/50R19 = 29.4X10.4R19
285/45R19 = 29.1X11.2R19
295/45R19 = 29.5X11.6R19
245/50R20 = 29.6X9.7R20
255/45R20 = 29X10R20
265/45R20 = 29X10.4R20
275/45R20 = 29.7X10.8R20
285/40R20 = 29X11.2R20
295/40R20 = 29.3X11.6R20
265/40R21 = 29.3X10.4R21
275/40R21 = 29.7X10.8R21
295/35R21 = 29.1X11.6R21
255/35R22 = 29X10R22
265/35R22 = 29.3X10.4R22
285/35R22 = 29.9X11.2R22
295/30R22 = 29X11.6R22
305/30R22 = 29.2X12R22
275/25R24 = 29.4X10.8R24
29X10.50R15
29X11.50R15
29X8.50R15

30" Diameter Tire Conversion Chart

255/75R15 = 30.1X10R15
265/75R15 = 30.6X10.4R15
295/65R15 = 30.1X11.6R15
215/85R16 = 30.4X8.50R16
235/80R16 = 30.8X9.3R16
245/75R16 = 30.5X9.7R16
255/70R16 = 30.1X10R16
265/70R16 = 30.6X10.4R16
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
235/65R18 = 30X9.3R18
245/65R18 = 30.5X9.7R18
255/60R18 = 30X10R18
265/60R18 = 30.5X10.4R18
285/55R18 = 30.3X11.2R18
255/55R19 = 30X10R19
265/55R19 = 30.5X10.4R19
275/55R19 = 30.9X10.8R19
235/55R20 = 30.2X9.3R20
255/50R20 = 30X10R20
265/50R20 = 30X10.4R20
275/50R20 = 30.8X10.8R20
295/45R20 = 30.5X11.6R20
305/45R20 = 30.8X12R20
265/45R21 = 30.4X10.4R21
295/40R21 = 30.3X11.6R21
265/40R22 = 30.3X10.4R22
275/40R22 = 30.7X10.8R22
285/35R23 = 30.9X11.2R23
255/30R24 = 30X10R24
275/30R24 = 30.5X10.8R24
285/30R24 = 30.7X11.2R24
30X9.50R15
30X10.50R15
30X11.50R15
30X11.50R16

31" Diameter Tire Conversion Chart

235/85R16 = 31.7X9.3R16
265/75R16 = 31.6X10.4R16
275/70R16 = 31.2X10.8R16
235/80R17 = 31.8X9.3R17
245/75R17 = 31.5X9.7R17
255/70R17 = 31.1X10R17
265/70R17 = 31.6X10.4R17
285/65R17 = 31.6X11.2R17
255/65R18 = 31.1X10R18
265/65R18 = 31.6X10.4R18
275/60R18 = 31X10.8R18
285/60R18 = 31.5X11.2R18
255/60R19 = 31X10R19
245/60R20 = 31.6X9.7R20
255/55R20 = 31X10R20
275/55R20 = 31.9X10.8R20
285/50R20 = 31.2X11.2R20
295/50R20 = 31.6X11.6R20
255/50R21 = 31X10R21
285/45R21 = 31.1X11.2R21
275/45R22 = 31.7X10.8R22
285/40R22 = 31X11.2R22
295/40R22 = 31.3X11.6R22
305/40R22 = 31.6X12R22
285/35R24 = 31.9X11.2R24
275/25R26 = 31.4X10.8R26
295/25R26 = 31.8X11.6R26
31X9.50R15
31X10.50R15
31X11R15
31X11.50R15
31X12.50R15
31X13.50R15
31X10.50R16
31X11R16
31X11.50R16
31X12.50R16
31X10.50R17

32" Diameter Tire Conversion Chart

265/80R16 = 32.7X10.4R16
285/75R16 = 32.8X11.2R16
305/70R16 = 32.8X12R16
255/75R17 = 32.1X10R17
275/70R17 = 32.2X10.8R17
285/70R17 = 32.7X11.2R17
305/65R17 = 32.6X12R17
255/70R18 = 32.1X10R18
275/65R18 = 32.1X10.8R18
285/65R18 = 32.6X11.2R18
305/60R18 = 32.4X12R18
265/60R20 = 32X10.4R20
285/55R20 = 32.3X11.2R20
305/50R20 = 32X12R20
315/50R20 = 32.4X12.4R20
325/50R20 = 32.8X12.8R20
275/50R22 = 32.8X10.8R22
285/45R22 = 32.1X11.2R22
305/45R22 = 32.8X12R22
285/40R23 = 32X11.2R23
305/40R23 = 32.6X12R23
295/35R24 = 32.1X11.6R24
305/35R24 = 32.4X12R24
315/35R24 = 32.7X12.4R24
405/25R24 = 32X15.9R24
265/70R18 = 32.6X10.4R18
32X9.50R15
32X10.50R15
32X11.50R15
32X9R16
32X10R16
32X11.50R16
32X11.50R17

33" Diameter Tire Conversion Chart

255/85R16 = 33.1X10R16
295/75R16 = 33.4X11.6R16
255/80R17 = 33.1X10R17
285/75R17 = 33.8X11.2R17
295/70R17 = 33.3X11.6R17
305/70R17 = 33.8X12R17
275/70R18 = 33.2X10.8R18
285/70R18 = 33.7X11.2R18
295/65R18 = 33.1X11.6R18
305/65R18 = 33.6X12R18
325/60R18 = 33.4X12.8R18
275/60R20 = 33X10.8R20
285/60R20 = 33.5X11.2R20
305/55R20 = 33.2X12R20
285/40R24 = 33X11.2R24
295/40R24 = 33.3X11.6R24
295/30R26 = 33X11.6R26
305/30R26 = 33.2X12R26
295/25R28 = 33.8X11.6R28
33X9.50R15
33X10.50R15
33X11.50R15

34" Diameter Tire Conversion Chart

315/75R16 = 34.6X12.4R16
315/70R17 = 34.4X12.4R17
285/75R18 = 34.8X11.2R18
305/70R18 = 34.8X12R18
325/65R18 = 34.6X12.8R18
275/65R20 = 34.1X10.8R20
285/65R20 = 34.6X11.2R20
305/60R20 = 34.4X12R20
325/50R22 = 34.8X12.8R22

36" Diameter Tire Conversion Chart

345/75R16 = 36.4X13.6R16
355/65R18 = 36.2X14R18
355/60R20 = 36.8X14R20
325/55R22 = 36.1X12.8R22
36X12.50R15
36X13.50R15
36X14.50R15
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