Feature: 1. Chrome Molybdenum Steel: The bike speed flywheel is made of high strength chrome molybdenum steel, with high strength and improved wear resistance.2. High Tension Backplane: The bike flywheel has a high tension backplane, and the is plated with three layers of nickel chrome, which is corrosion and rust proof. 3. Applicable To: The flywheel is only applicable to the modification of the external 7 speed cassette flywheel for Bromptom bikes. 4. Mud Discharge Holes: The bike flywheel has mud discharge holes, which can reduce the weight and make it easier to clean without mud. 5. Chain Guide Slot Design: The bike speed cassette adopts the design of chain guide slot, which makes the speed change more sensitive. Specification: Item Type: Bike Speed Flywheel Package List: 1 x Bike Speed Flywheel3 x Accessories |