Quote:
Originally Posted by Skimmer
Just FYI...Most of us are using 205/50-15 for autocross. The conventional wisdom in autocross is that wider=grippier=better and the marginal weight savings from a 195 tire won't get you anything. But it could be worth trying. The SCCA stock-class rules also require OEM-dimension wheels with an offset no more than .25" different from stock, so a 45mm offset aftermarket wheel isn't legal.
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Thanks for the info on the offset. I haven't run an A/X in 30 years and our resident A/Xer's not here. And in that case are wheel spacers legal if there is thread at least equal to lugbolt diameter? In that case I'd use 6mm spacers (1/4" = 6.25 mm).
How about antisway bar changes, additions, etc
And wider is not necessarily better; its the tread to road pressure that counts. Experience counts more tho so if the 20/50x15's are faster then thast is the choice. Hoosiers? Falken? Kumho?
And the rotating weight is very important.
PS my credentials?: quite a few trophies and A/X championships on both east and west coast back in the 60's. Its a great sport.