- Fits all front Big Twin Baggers, Sportster, most models 1984 & up with dual disc, will not fit Buell or V-Rod - Replaces 11 1/2" rotors, can be used on hubs that measure 2" diameter *Sold as pair (2-front rotors) *Uses 5/16-18 rotor bolts *Rust resistant *Polished stainless steel drilled brake rotors - Surface induction hardened with a 12-14% chrome content for better wear characteristics and heat treated to relieve stress