So I did the search and found that people using the Weld Wheels are using a 15x8 with a 6.5 in back spacing. There was only one person who was using the 15x10 like I want to do and his name is LUPE. I would like to know what the backspacing is for the 15x10 and if they will clear the calipers. I have the rx7.com launch kit on the car and was wondering if I could squeeze a 315 drag radial under the car without having to cut on anything? Any help would be awesome thanks.

 

Eric had a ford rear with totally different backspacing. BTW, you'll need a 7.5 backspacing and still will have to grind the **** out of your caliper so it won't grind.

 

Lupe is now Vikingwarhammer. Pm him and ask or he may chime in.

 

Thanks for the update ultimatejay. I saw that you have to grind off some material for clearance. Ernie do you know how much you have to grind out and is it still safe?

 

i run 5.5 backspacing on 15x8 and it works fine. some grinding is needed but not much.