Backspacing questions

[fastjuan]

I know this question has been asked before but just could figure out the right search words. I would like to put some 15 x 10 weld racing rims on my car and don't know what backspacing i should run. Would 5.5 inch back spacing be beter or 6.5? And is there any fitment issues with either. I am going to be running 28x11.5-15 et streets.

 

[white98snake]

on a 15x10 u gotta run 6.5bs. but u coudl run the same size tire on a 15x8 with 5.5bs and save some weight, i run a 275MT drag radial on a 15x8 with 4.5bs and it works fine

 

[fastjuan]

Thanks for the information WhiteSnake at what point would i need to run a 10 inch wide rim?

 

[white98snake]

when u go to a 12.5 tire then a 10in rim is needed but an 11.5 MT will work