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[jrin21]

are 20 inch tires too big for track use 10.5 width in back 8.5 in front

[STALKER]

18s are generally considered ideal for track use on this car. Some members use 19s. I would personally not use 20" rims for track. They are generally very heavy, limited tire selection, and cost is another issue.
With 20" tires, your side wall is very thin as well, and might not be ideal for track handling.

[jrin21]

Originally Posted by STALKER

18s are generally considered ideal for track use on this car. Some members use 19s. I would personally not use 20" rims for track. They are generally very heavy, limited tire selection, and cost is another issue.
With 20" tires, your side wall is very thin as well, and might not be ideal for track handling.

ill just buy a set of 18 comp tires for track day

[Victory Road]

While you can track 20" wheels, it is not ideal. 20" wheels are better for street applications where looks are the priority. 18" wheels are ideal for the track, but can cause issues with some big brake kits and wheel combinations. 19" wheels are a good wheel size for a street/track car, or for a car running a BBK setup.