Bike Crank,Arms Crank Set 170mm 104 Bcd Crank Set 170mm Alloy Bike Crankset Crank Arms Crank Set 170mm 104 Bcd Alloy Bike Left Crank Crankset 8/9/10/11 Speed Mountain Bike Left Laoshe
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Compatible with 8 / 9 / 10 / 11 speed. Come with a 4-bolt chainring.Narrow&wide teeth increase chain retention and wear life,reduce friction and noise. Square tapered crank arms. 104mm BCD. Suitable for most mountain bikes.