Theoretically, which would be better for performance (both setups on 255/40/17 square)

1. 17x9.5 +45 square
2. 17x9.5 +45 F, 17x9.5 +39 R

I'm thinking setup (2) would marginally yield a faster lap time due to wider track width in the rear. Is this desirable and/or worth losing the ability to rotate tires?

 

1) I doubt a few mms (1/4") would make any sort of difference.

2) Where are you finding 17x9.5 +45 wheels?? I want a set.

 

1) Negligible, yes, but for the sake of argument I'm sure there is a difference nonetheless
2) http://www.rayswheels.co.jp/products...a&wheel=CE28RT

 

We are splitting hairs here but don't forget about the increased aerodynamic drag from the wheel/tire sticking out further as well. Again, the difference is pretty negligible but It could negate any advantage that the wider track width may have. Personally, I think it would be silly to do the staggered offsets and lose the ability to rotate tires over a 12mm track width difference that I don't think would yield any real gain in performance. Just my .02.

 

Ability to rotate wins my vote for sure.

 

^^ what he said. i dont think there is any performance gains with a staggered offset. is there?

 

I'd use spacers to accomplish the staggered offset if you feel there may be an advantage.