[MikenOH]

Already posted on planet 9.

I'd like to use a set of 987.1 Boxster S wheels on a 981 S for track duty. The wheel width and offsets are nearly identical and I understand the 18" wheel will clear the calipers but with less clearance.

It's my understanding that the gap is about 19mm between the caliper and inside of the wheel; I measured my 19" stock rims on the 981S and the gap is roughly 30mm or a bit more.

Any downside to going with a wheel that will fit on the hub but not provide as much clearance between the caliper and wheel? Reduced brake cooling, maybe?

Thanks for any help.