Performance aluminum alloy bike disc brake mount adaptor, CNC process finish, lightweight, sturdy, high strength and durableWith 2 bolts and 4 washers, easy to install and convenient to useUniversal fits to 203 mm/8 inch disc rotorModel: Standard PM-PM-F/R203 (A Column), Mount Type: Post Mount to Front Fork Post or Rear Frame MountGreat replacement gear accessories for mountain, road, MTB Bike cycling enthusiastsSpecification:Material: Aluminum alloyOverall Length: Approx. 100 mm/3.9 inch to Distance: Approx. 73.5 mm/2.9 inchFrame Fixed Hole Distance: Approx. 51 mm/ 2 inchColor: Red, Titanium, Black, Blue, Gold for you choosePackage Includes:1 Piece Bike Disc Brake Adaptor2 Pieces Bolts4 Pieces WashersNote:Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks