i was wondering if the 17x7.5 +50 and the 17x8.5 +42 would work on the s2k any input would be helpful

 

the front would work but the rear would probably rub badly....if sticking with stock ap2 tire sizes.....

 

An offset of 42 on the rear will cause rubbing with some 245 tires. Others have done it with no rubbing. I think it depends on what tire you choose. For instance, Toyo tires run narrow so they often fit. It would be safer to use a 225 on the rear, but then you'd have to run something really narrow on the front to avoid an oversteery S2000, which is a bummer.

 

Front is perfect. Rear would need a 245 tire and some aggressive camber and some possible fender rolling. Possible, but not ideal.