Volk Racing Daytona Speed 17x7 +42 offset on S5 GXL?
 

I made an impulse buy on some Volk Racing Daytona Speeds for $400. The specs are 17x7 with +42 offset. What size tire would fit for sure without spacers or anything? Thanks for your help.

I've run 215/45-17 on 17x8 +40 up front with stock suspension and no rub (not tons of room, but enough). That size should fit fine on 17x7 +42. That assumes you're running stock springs.

Thanks for the answer. I will settle for 215/45-17s then. =) Seems like they are extremely close to stock size as well so my speedometer should be correct.