how much backspacing do i need?

[dustinmoran91]

i want to run a 29/12.5/15 slick and have a standard a body rear in my duster but need to know the backspace i need

 

[cudaspaz]

Not sure if you can do that wide.

Get a Percy's wheel rite tool for perfect measurement.

 

[jdakota]

Go to Summit Racing.com and read about how they measure backspacing. Measure your rear tire mounting surface to mounting surface, and also inside fenderwell to other fenderwell.
Find out what the section width of your tire is and using all of the measurements you have, do the math. I used to think it was very complicated but its really not.

 

[dustinmoran91]

Thanks everyone!