Features1ENHANCED COMPATIBILITY: 24MM flywheel connector adapter and 24T single speed flywheel design, suitable for modifying electric tricycles, motorcycles, go karts and so on. 2IRON MATERIAL: Bike freewheel adapter set is made of iron material, oil resistance, long service life, reliable and durable performance. 3STABLE PERFORMANCE: With its exquisite craftsmanship, the flywheel is durable and won't be deformed over time, keeping its function and performance. 4EASY TO INSTALL: The flywheel with connector is easy to install, convenient for professional bike mechanics and DIY enthusiasts. 5HIGHLY EFFICIENT: Provides stable and efficient power transmission. Fine engineered design reduces friction and maximizes energy transfer for seamless operation of your machine.SpecificationItem Type: Bike Freewheel Adapter SetMaterial: IronPackage List1 x Connecting Head1 x Flywheel