Quote:
Originally Posted by 8262S
I take it there is no issue with different tire size and the M3 AWD system? Must be bc they offer 19/20, but can people mount what they want without any drivetrain issues?
As a WRX owner that is a no go and is bad for the AWD system.
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Like all AWD systems, front to rear total diameter is absolutely a big deal. From what I've always been told, bmw is like Audi, and requires the f/r rolling diameter to be within 1% of each other. Just like you originally thought, you can do whatever combo you like, 19/21; 20/20, 20/21....whatever.
But make sure you keep the rolling diameters within 1%.