Roush 06 Wheel Offset #'s / MAX WHEEL/TIRE WIDTH?

Does anyone know the correct wheel offset Saleen has on their wheels? I might order a new set of wheels and need to know the correct offset for each wheel.

Also, does anyone know how big of a tire can go on the front and back of the car? Im probably looking for a 315/35/20 in back and a 275/30/20 in front, but possibly a 10" rim in front instead of a 9. Will it fit the brakes and wheel well?

how wide of a rim can go on the rear? possibly interested in putting on a 11" wheel.

Thanks all!
 
20x9x30mm offset Front
20x10x50mm offset Rear
315's in the rear will not fit as a guy a know put 315's on his and the rubbed both the inner wheel well and the outer fender lip. 10" wide in the front might cause a rubbing issue on the chassis as well. Hope this helps
 
really? man...my 01 saleen could fit a 315 np. ill just have to try a 305 then.

yeah thanks for the help. How do you find out the offsets? i could've sworn Saleen put different offsets on the driver or passenger side for turning or something which is why one wheel always stuck out farther than the other.
 
Look on the inside of the rim, its cast into one of the spokes. should look something like this...
50mm
20X9J

all on one spoke.

I have never heard of one wheel sticking out further than the other before... are you talking about the fronts or rears???