[threpwood]

I've tried looking the old posts regarding spacers, but still not very clear. Could you please verify if the set below can fit just fine into my box? I have 2004 boxster S with stock 17'' (not sure what offset these have).

Formula design 18'' silver
10.5 x 18 ET 42
8.5 x 18 ET 40

Will the above combo need spacer?

Also, I'm thinking to just put PS2 265/35 rear and 225/40 front.

Thanks for your help!