Question about custom wheel size for slicks

[Benchracer]

I want to get some 15" weld magnums to mount some 28x10.5 slicks on. What kind of back spacing, off set, etc. will I need to get to run those tires with out them poking out?

 

[GeorgeInNePa]

RT-S, not Magnums, but you get the idea...

http://www.svtperformance.com/forums/wheels-tires-285/856649-weld-15x10-275-rts-nib.html

 

[Benchracer]

RT-S, not Magnums, but you get the idea...

http://www.svtperformance.com/forums/wheels-tires-285/856649-weld-15x10-275-rts-nib.html

Thank you George.

 

[gtformula]

7.5 backspacing. My rts wheels fit perfect