TIRE SIZE vs. OVERALL DIAMETER GUIDE

This guide shows the following:
-Compares tire sizes to actual diameters
-Tells ideal wheel width for tire sizes (This thread doesn't yet, but the PDF does..)
-Gives actual tire width on ideal wheel (This thread doesn't yet, but the PDF does..)


*NOTE: All tires and tire manufacturers are different. This guide does not include every size. Also, it should be very close, but may not be 100% accurate for all tires...


I couldn't post the entire guide (wheels widths, tire widths, etc..) but I did attach the guide as a .PDF file. I can email it to you as a Word document or Excel sheet if you'd like...


TIRE SIZE______OVERALL DIA.

14"
195/75R14___25.5"

15"
215/75R15 ___27.9"
235/75R15 ___29.1"
30x9.50R15 ___29.8"
31x10.50R15 ___30.8"
32x11.50R15 ___31.8"
33x9.50R15 ___32.7"
33x10.50R15 ___32.8"
33x12.50R15 ___32.8"
35x12.50R15 ___34.8"

16"
215/70R16 ___28"
225/70R16 ___28.5"
225/75R16 ___29.5"
235/70R1 ___29.2"
235/85R16 ___32"
245/70R16 ___29.5"
245/75R16 ___30.7"
255/70R16 ___30.3"
255/85R16 ___33.3"
265/70R16 ___30.7"
265/75R16 ___31.9"
275/70R16 ___31.2"
285/75R16 ___33.1"
295/75R16 ___33.2"
305/70R16 ___33.1"
315/75R16 ___34.8"
345/75R16 ___36.38"
365/75R16 ___37.56"

16.5"
33x12.50R16.5 ___32.6"
35x12.50R16.5 ___34.6"

17"
225/70R17 ___29.6"
235/80R17 ___31.8"
245/70R17 ___30.8"
245/75R17 ___31.7"
255/80R17 ___33.3"
265/70R17 ___31.65"
275/65R17 ___31.2"
275/70R17 ___32.2"
285/70R17 ___33"
305/65R17 ___32.8"
315/70R17 ___34.4"
35x12.50R17 ___34.8"
37x12.50R17 ___36.8"
38x14.50R17 ___37.8"
40x14.50R17 ___39.8"

18"
265/65R18 ___31.7"
275/65R18 ___32.1"
275/70R18 ___33.2"
285/65R18 ___32.7"
305/60R18 ___32.6"
305/65R18 ___33.7"
325/65R18 ___34.6"
35x12.50R18 ___34.8"
36x13.50R18 ___35.51"
37x12.50R18 ___36.8"
38x14.50R18 ___37.52"
40x14.50R18 ___39.53"

20"
275/65R20 ___34.1"
285/55R20 ___32.5"
285/65R20 ___34.7"
305/55R20 ___33.5"
325/60R20 ___35.6"
37x12.50R20 ___36.8"
38x14.50R20 ___37.52"
40x14.50R20 ___39.53"
42x14.50R20 ___41.8"



...I also have this guide in a few different formats if you want me to email one to you

 

If that attachment above doesn't work...you can try either of these.

 

You do realize that tire diameter varies from one manufacture and model to the next and that the diameter of the tires tends to change based on what rim width you put it on right?

Thanks for the guide though.

 

It's not intended to tell some one they have 0.4" before they rub, it's supposed to help give an idea of the overall diameters and sizes...assuming the tire was mounted on the correct width wheel with proper air pressure.

 

hmm interesting, this seems accurate for bfg tires and the majority of others that measure a little small but it isnt for some bigger brand mud tires, some actually measure a little bigger. i put a set of treadwrights on my truck and the are made off bfg at's on a 315-70-17 carcass. a new bfg tire this size measures 34.8 or something like that, my new shoes run 35.6 almost an inch difference. this is not the most accurate way of stating things since they are retreads but you get the idea. i like the chart it sucks when you but a 35 thats barely taller than 33 inches

 

Thats not what he was getting at.
What he was getting at is that a 315/75/16 BFG Km2 is actually shorter than a 315/75/16 MTR Kevlar and so on and so forth. It varies by tire manufacturer.
Most web sites already show this information you posted. But, thanks, I guess..