SF-A268FB Mountain bike aluminum flower drum

This mountain bike's aluminum flower drum is currently the mainstream core transmission component of bicycles. It is made of 7075 aluminum alloy material, with a density only one-third of steel, which can significantly reduce the moment of inertia of the wheel set, making the whole car accelerate more quickly and reduce physical exertion when climbing hills. Compared with iron flower drums, it can reduce weight by more than 30%. The thermal conductivity of aluminum material can stably control the heat transfer on long downhill slopes, avoiding the problem of abnormal tire pressure and softening of the disc, ensuring stable braking force. At the same time, with high-precision Peilin bearings, it can reduce 12% -18% of rotational resistance and lower pedal power loss. This flower drum, with its lightweight and high adaptability, can be widely used in various cycling scenarios.