Can be installed without modification to the front fork. It can be installed at single speed as well as beginning to train the streets of the racer. Be sure to apply brake when running on a public road. The front fork uses a band type attachment that can be installed without a hole for a pivot bolt. Uses BRS101 dual pivot arch for excellent stopping power. Choose from 3 types for round forks, oval forks, and aero forks depending on the cross-section shape of the front fork. Dual Pivot Brakes: 1 x Brake Levers for Pistons: 1 x Brake Mounting Adapter: 1 x Brake Wire (Front Use): 1 x Front Fork Type: For Round Forks (Circle) for Oval Forks (Oval) For Aerofolk (Aero) Brake Body Color: Black, Silver *Cannot be used with carbon, aluminum forks, etc.