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Smaller Wheel size in rear for AX/Track?
An unorthodox solution i've heard about on corvette and Porsche boards is to use a smaller wheel size in the rear. For instance using a 18x8 w/245 in front & 17x9 w/275's out back.
Upsides being reduced rotational weight, quicker acceleration, more sidewall profile to absorb bumps & give better breakaway feel.
Downside's: speedo out of whack! unknown if 17's will clear stock Z4MC brakes. Might not be legal for SCCA A Stock class.
Has anyone tried this for AX / track work?
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