Aluminum Alloy Crank Arm Set, 1set

- Durable 6061-T6 aluminum alloy construction resists bending and deformation, ensuring long-lasting on rugged trails or daily commutes.
- Hollow arm devise reduces weight to approx. 728g per set, adding minimal load to your bike while maintaining axial strength and stiffness.
- Precision-machined surfaces and standard BCD 104mm spacing deliver secure chainring fit, reducing friction, noise, and chain drop for smoother shifting.
- 170mm crank arm length with no overlap on chainring bolts; compatible with single, double, or triple chainrings and 8-11 speed systems.
- Fits standard 68/73mm BSA bottom brackets and M14 pedals; includes left and right arms with 4 male/4 female alloy plate nails for easy installation.