Wheel offset
 

Whats a good offset for wheels that are like 9.5 or 10 inches wide? I want the tire to be flush with the fender. Tires will prolly be 275s on the rears and 245 on front. Any input would be helpful.

Please do a search, as this has been beat to death.

Common "Volk" fitment is 8.5 wide front, 9.5 wide back, both at +40 offset. With these, you could run 245/40 or 234/45 17 front (or 235/40 18) and 265/40 17 in back (or 265/35 18).

You could run 10-inch wide wheels in back with 265s (or 285/30 18s), with a +45 to +50 offset.