The Vintage Series Rear Brake Disc is part of the latest collection from Moto Master. Features: Vintage MX Discs provide that classic look while being manufactured to the tightest tolerances and standards Available for many oldschool motocross bikes. Specifications: Bolt Hole Circle: 144.0 mm Bolt Pattern: 6 Hole Braking Surface: Slotted Inside Diameter: 122 mm Material: Stainless Steel Outside Diameter: 220 mm (8-21/32'') Product Name: Brake Disc Shape: Round Thickness: 4 mm (5/32") Type: One Piece (Fixed) Units: Each To fit: HONDA CR 125 R 1987 All Models HONDA CR 125 R 1988 All Models HONDA CR 250 R 1987 All Models HONDA CR 250 R 1988 American Models HONDA CR 250 R 1988 European Models HONDA CR 500 R 1987 All Models HONDA CR 500 R 1988 All Models Manufacturer part number: 110814