SURIEEN 170mm Square Crankset for Mountain Bike with 104 BCD 38T Chainring Single Speed MTB Crank

【High Quality】: High-strength aluminum alloy material, high strength, fine workmanship, improve strength and rigidity; the surface of the 38T square taper crankset is frosted and anodized, which effectively protects the aluminum alloy body and does not fade after long-term use. 【Compatible】Suitable for most of 8/9/10/11 single speed MTB mountain bike, road bicycle, not for multi-speed bikes. 【Crankset Size】104BCD Mountain bike crankset, crank arm length: 170mm, chainring 38T，compatible with 9/16" pedals; chain size 1/2"*1/8"; chain line 45mm; B.B.Axle recommended 117.5mm. Total diameter of chainring is 158mm (6.2in). 【Upgrade Design】Light weight design, adding no heaviness to you bike, make riding more comfortable and relaxing. Narrow wide teeth for better chain retention. Removable chainring ,3 pieces chainrings crankset design, easy to modify single speed crankset, dual crankset, triple crank set. 【Package】Complete set including left crankset, right crankset and chainring; The crank and chainring are only fit single speed, cannot be used with other speed.