Quote:
Originally Posted by davchr
Wheel size is NOT going to change your top speed. The TIRE outer diameter will. The recommended tire diameter for BMW 20" and 21" wheels is nominally the same - 29.8". Mess with the tire OD and your speedometer will be wrong. If top speed is important, why are you buying a SUV? A 6000lb SUV with a high CG none the less?
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The OP is referring to the speed limiter which is in place with the 20's.