It will fit fine. On a side note, I originally had 8" Hayes rotors both in front and on the rear of my Heckler. However, due to something about my particular 8" rotor in back, it squealed like a pig without fail anytime I engaged the brakes, in any conditions. Mind you it squealed from day it was brand new, and well beyond the burnishing period. I changed the rear 8" to a 6" rotor and it stopped immediately. I don't think it had anything to do with the size of the rotor.bikerguy said:I am going to get a heckler frame, and I am wondering if I can use an 8 inch rotor in the back.