Yes, a lot of people are running 305/55-20's using the oem wheels.

Hey Buddy! Question - I have the stock 20" rims that came with my 2007 FX4 Screw that are rapped with P275/55/R20's Pirelli Scorpions. Is it possible to go with the exact same tire but only in a P305/55/R20? Will the factory rims handle that?

Quick question for you buddy, what is a 33/12.5/R20 in metric size?

Ok... well so much for the 20x10's.... :( Alright man I appreciate it I guess i'll order up the 20x8.5's.

Even though a member on here has a 20x10 rim with no issues, I trust you on this.

Have another question for you. I'm going with a 2.5" leveling kit in front and 1" in rear. I can't remeber if you said a 20x10 rim would rub really bad with a 4.626 backspace?
Do you think I'll have to go with the 20x8.5 on a 33"/12.5/20?

My is a 2007 FX4 supercrew with stock 20's.

Hey bud, could you give me a quick lesson on tire sizing I feel so lost when it comes to tire sizes. I want a 33" and after looking at 20x8.5 rims and 20x10 I think the 20x10 will give me a nicer dish look. But when it comes to 305/55 or 325/50 I have no ides what these number mean....

Any help would be great