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