help with mustang slicks
 

i have a 94 mustang stock rear8.8 got 10x15 pro stars with 4in back spaceing how wide a tire can i run and tall thank you and god bless

You can run a 12" tire on a 10" rim, but i don't know if it would/will clear your fender wells.

Zip.

If your going to run a slick on that wide of a wheel I assume you dont have the Quad shock setup, at which point you should be able to fit a 10" or larger tire tire, may be close but, as long as you clear the caliper get the wheel on there and see how it looks with no tire on the wheel and measure for clearance.