crank arm set mountain bike arm crankset 170mm 104 bcd aluminium arm set without bottom bracket kit and chainring bolts for mtb bmx road bike cycling bicycle accessories (colorful) qqy product description<br> <br> crank: 170 mm.<br> <br> material: aluminium alloy al6061<br> <br> specifications: bcd 104mm, approved hole spacing: 74mm<br> <br> weight: approx. 637 g.<br> <br> color: black, red, blue, gold, silver, green, purple, colorful<br> <br> advantages: use aluminium alloy al6061, light weight, appearance and fashion, very cool, axial strength, strong compatibility.<br> <br> please note:<br> <br> 1. please allow 1-3 cm error due to manual measurement (1 inch = 2.54 cm).<br> <br> 2. the item colour displayed in photos may be slightly different on your computer monitor than on your monitors. thank you for your understanding.<br> <br> package includes:<br> <br> 1 x a forged crank set.<br> <br> 4 x chain ring screws (set).<br> <br> 1 x m15 crank screw.<br> <br> 1 x allen screw