cragar backspacing
 

Will the 8 in cragar backspacing push my tires out more than stock 2wd rims? I know they will be sticking out with the 31s more than stock

I think you may be confused on the back spacing can you post a link to the rims you are talking about please?

They have 4in backspacing but will they push my tires out more?

will the 4in backspacing rub caliper they are 15x8 and im gonna run 31s with them??

stock 2wd backspacing is 4.5"?


So comparing backspacing 4.5" --> 4" means the wheel will stick out .5" further due to backspacing


The wheel is also 1" wider so you have to add that in as well to make it 1.5" further out than stock wheels.


Or maybe this way might be clearer
7" wheel - 4.5" BS => outside of wheel is 2.5" from mounting surface
8" wheel - 4" BS => outside of wheel is 4" from mounting surface


4-2.5 = 1.5" further out

Ok but will these rims rub caliper?

no.


you're going further away from the caliper and keeping the same diameter, there's no reason they would rub the caliper.