cysky bike crank arm set mountain bike crank arm set 170mm 104 bcd with bottom bracket kit and chainring bolts for mtb bmx road bicyle, compatible with shimano, fsa, gaint (black) cysky <p><b>specifications:</b></p> <p>material: aluminum alloy<br /> bcd: 104mm<br /> crank arm length: 170mm<br /> crank related holes distance: 74mm<br /> bottom bracket diameter: 23.79mm<br /> b.b bsa: 68~73mm<br /> color: black<br /> crank bolt diameter: 15mm<br /> compatible with: single chain/double chain<br /> weight: about 615g</p> <p><b>package includes:</b></p> <p>1 x one fordged crank set<br /> 1 x bottom bracket<br /> 4 x chainring bolts(set)<br /> 1 x m15 crank screw<br /> 1 x crankset bolt allen wrench<br /> </p>