I have 17 x 8 billet specialties on the rear. These wheels have a 4inch offset. The tyre clearance to the guard and the pickup box is 3/8 inch. Tyre size is 235 x 65 x 17 or 9 1/2 inches wide with a 2 1/2 inch wall height. If you were to run a wider rim you may have to do a few modifications to either the guard or the pick up box side. Fronts are 17 x 7 with a 3 1/2 backspace offset without power assistance, at slow speeds the steering is a bit heavy. If you went to 8 inch without power assistance you may need a gym membership. Also if you have stainless steel arms these are 3/4 inch narrower than steel ones beware