So my friend just informed me that the "new kid on the block" tire in SCCA CSP is the Hoosier A6 in 255/40/13. Does anyone have any experience mounting a 13" wheel on an FC? They definitely won't fit over my four piston calipers, but I can change to any caliper and rotor combination that I want. I'm thinking this can work, just not sure where to start.

 

Yes, they fit if you use a steel wheel (not cast alum.) and you are using the rotors that have four lugs. I am trying to the remember the offset, and just I cannot. I know the back spacing is like 5".
Good luck ~

 

The new kid may be the 255/40/13, but you can still get the 275/35/15, which will be easier to get to fit over the brakes.

 

I'm using 275/40/17 right now and I'm not really using the entire tire. I was considering 245/40/17 when my friend told me about the 255/40/13. 275/35/15 would be a good option though.