My race tires are R888 and they are on 15". My car is primarily a track car, but it is registered as an antique, so I can drive it on the street. It is currently sitting on the stock rims, as the obviously, but I also have a set of Diamond Racing wheels with Hoosers of the above sizes on them.
What I will probably do, is just use the Diamond Racing wheels for... racing. I was trying to get something wider so that this beast is drivable on the street too.
For those concerned, the fenders are rolled, and the above listed tires/wheel combo has been run on this car. The drive train is NOT stock, it is a built and ported TII. I am running a standalone with 1600cc secondaries, FMIC, and BNR stage 4 with a 12psi wastegate. This car is not used for drag racing either.