The Shuriken oversized pulley system was engineered for maximum performance and designed to enhance drivetrain efficiency on any bike.Specifications:- Ceramic bearings: TBT- Pulley Wheel: Upper 15T, lower 19T - Compatibility: Road-AXS (excluding XPLR) Red and Force, 33T and 36T versions- Drivetrain: 13T(chainring) + 26T(cassette)- Cogs: 36T- Plate material: Matte 3K Carbon- Pulley material: Aluminium with titanium coating- Weight: 61 g