2 GTOs

Car is a c5z, track alignment (-2 I believe), DRM brake ducts and T1 bars. Lowered a little I want to use 4 OEM 18 inch rims and Hoosier a6 tires. What size Hoosiers are some of you using for this set up. I am thinking of starting with some 275 18 scrubs.

My other set of wheels at CCW with 315/17 and seem fine as a point of reference.

Thanks

RX-Ben

If you don't class rules to worry about, then why not use 285s?
Somebody else may chime in about whether 315s are ok with the 10.5" wheels.

You should also put in all of the camber that you can, all around.

charger21

315's on C5Z rears at all four corners seems to be a popular set-up

2 GTOs

Sounds like anything between 275-315 should work. I guess it will just depend on what scrubs I can find.