Note:The Crank is compatible with single and double 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. Crank description: Brand: BUCKLOS Crank Arm length: 170mm Material: 7075-T6 Aluminum alloy Compatible: Single and double, Triple chainring Bolt Center Diameter: 104mm BCD Weight: about 541g (right & left) Color: Black Advantages: Light weight,stylish appearance,very cool,high strength axle,strong compatibility. Chainring description: Brand: BUCKLOS Material: 7075-T6 Aluminum alloy Size: 30T,32T,34T,36T,38T,40T,42T Compatibility: 8,9,10,11 speed chain Bolt Center Diameter: 104mm BCD Thickness: 4mm Shape: Round/Oval Color: Multicolo.
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