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The cog adopts high tensile steel as material and the internal thread is of high precision, smooth rotation and easy maintenance. Speeds: 9 Speed Teeth: 11-12-13-15-17-19-21-23-25T Weight: 0.52lb(235g)
【Long Life Span】The freewheel is made of high quality metal, which is anti-corrosive and have good heat resistance.There is no worry that the long-term use of friction heat will shorten its life .
【Compatible】This cassette is a cassette sprocket for 9-speed shift mountain bike. You can control the shift function well by the unique design of the gear sprocket exclusively for road bike.
【Cool Outlook】The product adopted the hollow design to light the weight to some extent. The surface is made by the technology of chrome plating which will not fade . And the surface of silver is of a fine appearance and will give you a luxurious feel.
【Hollow Design】The product adopts hollow out design to reduce weight and decrease the burden when riding,which can bring you a good using experience.
【Material】It is made of hardened Chrome-molybdenum steel material , making it one of the most durable, long-lasting freewheels for multi speed bikes on the market.