Promax E1 Endurance disc rotors are designed to handle the rigors of all-mountain riding and e-bikes where extra strength is required Delivers consistent, quiet braking performance Includes rotor fixing bolts Rotor Type: One Piece Hub/Disc Compatibility: 6-Bolt Rotor Size: choose; 160mm, or 180mm Pad Compatibility: All Pad Compounds Weight: 142g. (160mm); 165g. (180mm)