UK 0-1 day dispatch√48h Delivery at the earliest Crank Arm Description: Brand: BUCKLOS Crank Arm length: 152/170/175mm Material: AL6061 aluminum alloy Shape:Square/Diamond/Spline Hole Model:1.Only Left Crank Arm 2.Left+Right Crank Arm Weight: about: 1.L+R(Square/Diamond):152mm-0.4kg/170mm-0.5kg 2.L(Square/Diamond):152mm-0.19kg/170mm-0.24kg 3.L(Spline):170mm-0.28kg/175mm-0.285kg Advantages: High hardness,stable transission,High strengthaluminum alloy material,Easy to install, Best Replacement：Use this crank arm to replace the broken crank arm. Notes:L+R crank arm is mainly suitable for e-bikes and indoor bike. .