Rotor diameters

[big4x4ride]

does anyone happen to knopw the diameters of 8 lug 10 bolt rotors?? head that the 8 lugs come in 11 3/4 and 13"?? trying to verify so i can do discs on my SF 60 rear

 

[4X4HIGH]

Rotors are definately not 13", i believe that 11 3/4" is correct.

 

[scrappy88]

I just measured mine, they are 12 1/2"

 

[R72K5]

12 or 12.5" would be correct, i could look in original GM RPO info and get you factory printed size


the rear drums were 13 something i know though