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Old 05-17-2011, 05:33 PM   #1
z_man93
Registered User
 
Join Date: Oct 2009
Location: San Diego
Posts: 30
My Ride: 328ci
255s on 8.5" Rims for racing?

I'm trying to come up with a track setup that is decent and affordable. I have qty6 M68 wheels already, so it's a sensible choice to go with considering the 8.5" wheels are only around 21lbs. I've only done 6 autocrosses over the past year, so I don't need anything extremely competitive. I'd rather spend my money on more seat time. I am however driving at the limits of my current setup.

I'd like to go with a square setup all-around with my M68 8.5" and wide-as-sensible Star Specs. I'm trying to do as many AutoXs as possible and also fit in a couple NASA HPDEs this summer. For SCCA STX the widest tire I can go with is a 265. I couldn't imagine fitting a 265 on an 8.5" wheel so I'm leaning towards a 255.

My question is whether or not a 255/40/R17 is too wide for an 8.5" wheel for competition driving? That's ~.75" overhang on either side.
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Anthony Colin Bruce Chapman: Adding power makes you faster on the straights. Subtracting weight makes you faster everywhere.
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