What Is The Biggest Tire You Can Fit On An 18" Rim On A Stock 04 Supercrew 2wd.also Whats The Biggest You Can Fit On A 20" Rim,width And Height.thanks For Any Input.

 

You can go with a 33x12.5x18 tire and put them on your truck now, you would need to do lifting to fit a bigger tire but the rim can hold larger (ie 35").

 

I did not think that you could run the 33's on the 2WD stock or the 35's with the lift. I believe it sets lower than the 4WD.

 

yeah a 32x10.50 is the biggest you are gonna be able to fit on a 2wd.

 

Right, the 4x2's sit lower. What kind of tire/wheel package are you looking at? Street or off road? The reason I ask is wheel width and backspacing are as important to fitment as tire size. Most off road style wheels tend to run less backspacing than street style wheels.

 

Thanks For The Info. What About On A 20" Rim.also If I Run The 32x10.5's, What Backspacing Would I Require. Thanks