Round

Note:The Crank is compatible with single ,double and triple speed chainring,not only high compatibility,and ultralight,with high strength axle.Narrow wide chainring will grip the chain perfectly, prevent chain drops, and they both are made of aluminum allo,CNC machining.We will ship from real US warehouses,fast and efficient shopping experience, as well as brand quality assurance for you. Crank description: Brand: BUCKLOS Crank Arm length: 170mm Color: Black Material: 7075-T6 Aluminum alloy Compatible: Single and double, triple chainring Bolt Center Diameter: 104mm bcd,64mm bcd Fit 8-11 Speed Weight: about 500g (right & left) Color: Black Advantages: Light weight,stylish appearance,very cool,high strength axle,strong compatibility. Chainring description: Brand: Snail Material: 7075-T6 Al.