Product information: 

Name: Hollow integrated crankset crank
Crank: 170MM
Material: aluminum alloy
Crank screw diameter: 15MM
Compatible: single disk, double disk, three disk
Specification: BCD 104
Weight: a set of left and right cranks 637g
Color: gold, purple, blue, black, silver, red
Advantages: made of aluminum alloy, light weight, stylish appearance, dazzling shape, strong shaft strength, and strong compatibility