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Product Parameter-The 25H70 tooth bicycle threaded crankset is made of steel, the external rotating gear has 70 teeth, there are three holes in the chainring of the bicycle, the total diameter of the bicycle chainring is 14.5 cm, and the inner diameter of the bicycle chainring is 2.9 cm.
Durable-The bicycle crankset is made of steel, it has been professionally designed and strictly controlled, it can withstand the squeezing force caused by the instantaneous acceleration of the bicycle, the product is durable and has a long service life, the rainwater on the chain wheel will not cause rust.
Bike S-peed Up Fast-The bicycle chainring is professionally designed by engineers to minimize the efficiency conversion loss of the product, compared with the same product, the s-peed of the same power is the fastest, the road chain ring can provide perfect s-peed for any road transmission system.
High Load Capacity-The steel bicycle sprocket of the mountains bike has been hardened and heat treated with high hardness, which can withstand the squeezing force of the bicycle body and the friction between the bicycle chainring and the chain during high-s-peed driving.
Easy Installation-This bicycle sprocket is easy to install, just install the current bicycle sprocket ring gear to the core drive group of the bicycle, and then align the gears on the sprocket ring gear with the chain, and you can use the bicycle, it is a good helper for repairing the bicycle.