Quote:
Originally Posted by rak299
Circumference is pi times diameter. If one is within 1%, so is the other one
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Really?!?! How did you remember such a complex equation?
I ran into this problem on our g20 x-drive when buying winter tires. In my case, it was the front tire that was larger in diameter (front +0.8% wrt rear dia). Switched to a setup with the rear tire having a larger diameter (front -0.8% wrt rear dia) and it’s worked perfectly for the past 4 years.
I tried a few additional tire diameters and found for the g20 330ix with THP that front tires with diameters +0.5% to -1.00% wrt the rear diameter works perfectly. For some reason, the g20 330ix is slightly biased more towards a front tire that is smaller in diameter than the rear tire. I initially thought it was going to be +1.0% to -1.0% wrt rear tire. What is it for the g8x x-drive?