Anyone run a 285/30/18 with the RPF1 9.5 15 offset? I curently run the 275 but they are very close to the coilover. Want to buy 4 new ones for next season, Thanks.

Put a 5mm spacer on.
I run 265 R1's on the same wheel and was thinking about going to a 275. How close are they?

A friend of mine have a set, let me know if you are interested, ill call him to see how much he wants

Spacer will put me 7mm closer to the fender and I don't want that. I have been rubbing a little on the fenders with the 275's.

Fenders rolled/pulled???

My fenders are pulled and I also raised my car up for more clearance. I'm only lowered 3/4 front and 1/2 in the rear. On the track it actually feels better not being so low.

If you have coiloves, just run a shorter spring. That way the perch is above the tire, so you can go in. You may have done this already for all know.

Spacer will put me 7mm closer to the fender and I don't want that. I have been rubbing a little on the fenders with the 275's.
never mind.... found my answer.