Crank description: Brand: BUCKLOS Crank Arm length: 170mm Material: AL6061 aluminum alloy Compatible: Single/Double/Triple chainring; for 7/8/9/10/11S chainring Bolt Center Diameter: 104mm BCD Weight: about 707g (right & left) Advantages: light weight,stylish appearance,very cool,high strength axle,strong compatibility Chainring description: Brand: SNAIL Type: Single speed (circular disc / oval disc) Material: 7075-T6 aerospace aluminum alloy Compatible with 8,9,10,11 speed chain Color: Black/Red/Gold/Blue/Purple Thickness: 4MM BCD: 104MM Size:32T, 34T, 36T,38T,40T,42T Shape: Round, Oval Round Weight: about (38g)/32t,(50g)/34t,(57g)/36t,(70g)/38t(88g)/40T(102g)/42T Oval Weight: about (40g)/32t,(49g)/34t,(59g)/36t Bottom Bracket description: Can fit bike bottom 68-73mm Size: 41*24*24 hollow.
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