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Discussion Starter · #1 ·
I was considering joining the local SCCA autocrossing scene, and I found out that tires can be changed in the stock class.

I understand that the IS has both the Bridgestone Potenza ??? and the Eagle GS-Ds (which is what I have); will these tires do the job or are there tires that will significantly improve handling?
 

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I autocross my IS 300 on 16" SC300 wheels with Kumho 225/50/16 inch tires. The legal wheels are 16 x 6.5 inch with a +50mm offset unless you have a spare set of 17's lying around.

The alignment specs are 1.0 degrees negative camber all around (just rotate the eccentrics 180 degrees) and 1/8 inch toe in out back - zero toe front.

-Derek
 
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