What size semi slick on a 15x8" +36 6uL wheel on an em1?

[chargeR]

to be honest, was worried about them not fitting and rubbing on the inside of the wheel well. Also thought if I can fit a 225 on an 8" comfortably, then why go to the 9" and possibility have more scrubbing issues.

Or go big baller and run a 15x9 6UL on the front with a 225/45R15 Hoosier R6 with a 205 on the rear on the 15x8. Fast. I will buy you a beer if you don't go faster :P.

Why 15x8's?

I would go an inch wider on the rims, 15x9's. Run the 225/50's with the 9inch.

Does the 15x9 +36 6UL require a spacer to clear at the front on an EG? The knuckle I mean, not full lock etc.