hey ive been searching for the right wheel to go with the tires i want and i have a couple of questions, i want to get the 36X13.5-R20 IROKS now what size wheels would i need i heard 20X10 but can i fit 20X9 or 20X8.5 what would be the best. also i heard that 04 & up f150s cant fit 17" wheels cause of the brakes or something, is this true?

o yea and i was wondering if 325=35" or 37" and what 315=?

 

I'd go with a 9 or 10 inch wide wheel. And yes, you can fit 17's on the 04's. As for the metric sizing system, 315 and 325 are the width of the tire in millimeters.

 

Id go with a 10 inch wheel.

 

ok ill go with a 20X10 inch wheel but what backspacing should i have, and if i got a wheel with 4.5 bs would it rub?

 

The 04-07 OEM wheels have 5.5 inches of backspacing. Try to stay close to that. Personally, on a 10 inch wide wheel, I would want 6 inches of backspacing but it depends on how far you want the tire/wheel to stick out. A 10 with 4.5 inches of bs will stick out 3.5 inches farther than your oem wheels. A 10 with 6 inches of bs would stick out 2 inches farther than the oem wheels. What kind of lift do you have?

 

im getting a 6" fabtech and a 2.5" as level i really dont care how far it sticks out as long as its not even with the truck, i just dont want it to rub at all