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Old 01-09-2013, 11:43 PM   #4730
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Join Date: Apr 2008
Location: Denver, CO
Posts: 523
My Ride: 2005 BMW M3
Originally Posted by tacomeat1 View Post
Thouroughly confused by the square set-up thing, I get the pros, but have also read it can "confuse" the M-diff and make the car understeer at turn in and skittish in a straight line.

Square is better handling.

Here is the best tire sizing thread. http://www.m3forum.net/m3forum/showthread.php?t=318122

For street tires I still have a staggered setup. For the track, I run 265/35/18. I have a set of spacers for the rear wheels so I can have the same offset wheels and rotate them. I also have adjustable camber plates for the front. With the track tires I add some negative camber, which is better on the track and lets the 265 or 275 tires fit in the front.

If you run square all the time, you will have to figure out what tire width vs. camber vs. toe settings you want.
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