Looking at a set of these for track wheels.....what would be the correct offset for a stock, non-lowered (for now) Cooper using SO3s in 205/50? I believe the available offsets for 15x7 are 38 and 45mm.

Also, will these wheels need centering rings?

Thanks.

 

45's will be your best bet, no question. You will probably need the centering rings. Ask your Volk dealer if the wheels are hub centric, my 16x8's ce28n's were not, if not ask for the plastic centering rings not the metal ones unless you run lots of laps at the track. Plastic will melt at track temps, but the metel ones tend to stick to the wheel hubs when changing tires and can be hard to get off.

 

Thanks gowest--these will be track wheels so I'd get the metal ones.