Crafted from materials, the 170mm crank arm set is built to withstand the rigors of intense cycling sessions. Its compatibility with various bike models, including mountain bikes and road bikes, makes it a versatile addition to your cycling gear. The crank arms are designed to fit seamlessly with your bike's existing components, ensuring a secure and stable ride. great for both indoor stationary bikes and outdoor electric bicycles, this crank arm set enhances performance and durability. Features -Color:Black -Material:Metal -Size:21.00X3.50X2.70cm/8.25X1.38X1.06in -material: constructed from metal materials, these crank arms are built to withstand the rigors of intense cycling, ensuring longterm reliability -Precision engineering: the crank arms are engineered to provide a great fit for midmotor electric bikes, ensuring seamless integration and optimal performance -Wide application: compatible with various bike types, including exercise bikes, mountain bikes, and road bikes, these crank arms are a versatile choice for any cyclist -Userfriendly design: featuring an easytoinstall design, these crank arms allow for quick installation, making them ideal for diy bike enthusiasts -Optimal length: measuring 170 mm, these crank arms provide the ideal length for efficient power transfer and improved cycling performance Package list: 2 x left and right bicycle cranks