Bucklos bike crank arm set is forged from premium aluminum alloy,Which has Three interface types, square hole,spline hole and diamond hole, the sizes of 152MM/170MM/175MM to choose from.Bucklos bicycle crankarm is a nice replacement for bike repair suitable for the ebike,mountain bike,folding bike,fixed gear bike,exercise bike,etc Crank Arm : Brand: BUCKLOS Crank Arm length: 152/170/175mm Material: AL6061 aluminum alloy Shape:Square/Diamond/Spline Hole Weight: about: 1.L(Square/Diamond):152mm-0.19kg/170mm-0.24kg 2.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.
eBay