SunyaMood MTB Cassette Freewheel Single Speed Bike Flywheel Spro et (16T)

1. The flywheel adopts hi resistance stainl steel, its strength and hardn are t ce as hi as that of ordinary 316 stainl steel, and the hardn reaches 18 degre 2. The screws are made of stainl steel, anticorrosive and rustproof, suitable for long-term tdoor cycling. 3. The compr ion plate and gasket are made of 6061 aluminum alloy, which is ultra-li t and corrosion resistant, maintaining strength and reducing wei t at the same time.