Quote:
Originally Posted by Ether
Hello, I am thinking of running a square setup with 20x8.5 ET37 on my 435i xDrive. I was wondering which would be a better tire size to run this square setup 245/35/20 or 245/30/20?
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better for what? one is 25.8" diameter the other 1" inch taller at 26.8" almost F34 size
26.8" will decrease wheel gap, ride better, have more impact protection, fix speedo error but slow your acceleration(albeit slightly). 25.8" is little shorter than OEM, opposite qualities of the taller and have better steering response.
here is a thread of the taller size on an F31...
https://f30.bimmerpost.com/forums/sh...d.php?t=849595
personally i'd just put 255/30/20 (26") square. oem size and most width for N55 torque