Tyre calculator

[97discotdi]

I have found this site really helpfull hope you do. Cheers Keith
http://www.dakota-truck.net/TIRECALC/tirecalc.html

[chunk]

Thats a good find Keith and should be quite useful.:cool:

[barryj]

I used this site a couple of years ago

http://www.1010tires.com/TireSizeCalculator.asp?action=submit

It has been updated to what I remember but it might be useful.

[Bulldog]

I always thought my 215/70/R16's were 29x9.5. Turns out they're 28x8.5. Makes my jump to 31x10.5 a bigger step than i thought... :cool:

[97discotdi]

Maybe the administrators of AULRO can check out the sites and make a usefull one an easy to access site link(hope I got all the techno terminology right):o

[Pedro_The_Swift]

try
Links
Technical
General
The Car Bible

This page is AMAZING,,

and has been "linked" for a Looong time,,,;):D

[Ralf_the_RR]

OK guys, it's just maths!

Let's start with a 31 x 10.5 x 15

Width is 10.5 x 25.4 = 266.7
Aspect Ratio is (31-15)/2/10.5*100=76.2
Wheel dia=15
Therefore a 31x10.5x15 is approx 265/75/15

Now going the other way
225/75/16 is:

Height is 225/75/2/1000*2.54+16=29.3
Width is 225/25.4=8.86
Wheel dia =16
Therefore a 225/75/16 is approx 29x8.9x16