backspacing on stock steel rims vs aluminum

[93xjpos]

i had my 31x10.5x15's on stock steel rims and never had a problem with rubbing. now i have them on stock aluminum rims and they rub at full lock. do these rims have different backspacing?

 

[Ray H]

BS is the same for 7X15 wheels whether they are aluminum or steel. 5.25"
If you went to an 8" wheel, the BS will be 5.5"

 

[93xjpos]

i figured they would be the same just cant figure out why they started rubbing with the aluminum ones and not the steel.

 

[gradon]

I measured my 15x7J(stamped on the inside)stock aluminum 5-stars to be 8" wide. I didn't measure the BS, but it's supposedly 5.25".

 

[Ray H]

i figured they would be the same just cant figure out why they started rubbing with the aluminum ones and not the steel.

Where is the rubbing. Something I noticed with the aluminum is that the bead lip is wider than the steel. Is the bead lip on the rim rubbing the swaybar bracket? I had to bend my swaybar bracket in just a little to keep the edge of the aluminum wheel from rubbing it.