Tire Calculator

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

Diameter
Width
Sidewall
Circumference
Revs/Mile
in.
in.
in.
in.
Compare Prices
Use either calculator to generate a list of tire sizes. Click a size to see which tires are available in that size and then choose each tire to compare prices.



Toyo TiresToyo Open Country M/T
Open Country M/T
General TiresGeneral Grabber A/T 2
Grabber A/T 2
BFGoodrich TiresBFGoodrich Mud-Terrain T/A KM2
Mud-Terrain T/A KM2
Goodyear TiresGoodyear Wrangler DuraTrac
Wrangler DuraTrac
Use our tire calculator to calculate the diameter, width, sidewall, circumference, and revolutions per mile of any tire. Just type in a metric or standard size tire and click calculate. Browse tires by vehicle by choosing your options from the lists. Inch measurement tires are fairly easy to understand however metric tires use a more difficult system to read. The first number on a metric tire is the width. Divide this by 25.4 to get inch equivalent. The third number generally preceded by an "R" is the wheel diameter. The sidewall and aspect ratio are used in metric sized tires to determine the overall height of a tire. The second number on a metric tire is to calculate the side wall measurement. The sidewall height is a percentage of the width of the tire. This second number is that percent.

Our tire calculator does these calculations for you. Just type in the metric fields and click calculate. It also solves the problem of deciding what tire you would like to run if you have inch measurements in mind but can't find a company that manufactures that inch size tire. Just fill in the inch measurements you are looking for and it will calculate and it will display tire suggestions of available tire sizes. There are many more possibilities and choices in metric tires so the use of a tire calculator can come in handy.

The tire size comparison calculator takes the measurements of two tires and compares the diameter, width, sidewall, circumference, and revolutions per mile. Then as a bonus it shows examples of your speedometer reading with the first tire, and the actual speed you're traveling if you were to install the second tire. A very useful tire calculator when searching for tires that are a different size then stock.

A tire size conversion calculator or tire diameter calculator are the best ways to get the answers you are looking for. What sets us apart is our tire suggestion guide. For each tire size you input our tire calculator suggests multiple tire sizes that are with in one inch bigger and smaller of the entered tire size. Making it as simple as possible to find the tire that is just right for you.

Also browse our tire categories and deals pages for Jeep tires, 4X4 tires, cheap new tires, all weather tires, cheap truck tires, all season tires, and tires with free shipping.

Tire Calculator Charts by Wheel Size

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

Tire Calculator 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

Tire Calculator 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 Calculation 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

Tire Calculator 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

Tire Calculator 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

Tire Calculator 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

Tire Calculator 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

Tire Calculator 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

Tire Calculator 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

Tire Calculator 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

Tire Calculator Chart for 23" Wheels

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

Tire Calculator 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

Tire Calculator 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

Tire Calculator Chart for 28" Wheels

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

Tire Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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 Calculation 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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