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      06-06-2008, 11:33 AM   #4
ben@tirerack
M3Post Supporting Vendor
 
Drives: 740i
Join Date: Mar 2008
Location: South Bend, IN

Posts: 823
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On the M3, the rear tire should be slightly taller than the front, so do not use 275/30R19 with a 245/35R19. Ideally you would go 255/35R19 front with 275/35R19 if you wanted to go wider.

275/35 rear with 245/35 front would *probably* be ok, but the understeer would increase, as noted above. The change in width is what changes the handling balance.
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