This is a brand new OEM Factory Rotor that was used on 2004 Mastiffs. It will fit all other Big Dog Models from 2003-04, but the decorative design pattern will be different. This rotor is drilled for the front wheel with 5/16 diameter mounting holes. If you need it for the rear, you will have to drill the mounting holes out one size larger to 3/8 diameter. Other than the mount hole size, the rotor disc is the same for front & back.
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