Mickey Thompson Backspacing

hey i was looking into getting tom m/t rims for my 01 first gen and im not sure what backspacing i should go with or if there is a similar rim feel free to post some pictures

 

I just ordered some of the new"er" mickey thompson classic II's in black. They come with b/s of 3 5/16" so it should stick out a little over an inch over stock. the lower the number the more it sticks out. i think your truck came with a b/s of 4 or 4.5". not too positive on that number though..

 

stock is 4.5''

 

maybe im totally wrong here but the backspacing adds clearance for a larger tire size right? basically im not gonna rub now where as with stock i had no rubbing?

 

Depends on the tire size. With 285/75-16s or 33x12.5-15s, moving the tire away from the UCA with a rim with more BS can sometimes cause interference with the pinch weld or firewall or even the frame.