- Perfect Fit: Designed with a standard aperture cut for seamless compatibility with your bike. The 170mm crank arm length ensures no interference between the crank arm and the chain bolt. - Versatile Use: These crank arms are compatible with a variety of bicycles, including road bikes, mountain bikes, folding bikes, and fixed gear bicycles. Ideal for upgrading or repairing your bike, they cater to multiple bicycle models. - Spindle Interface: Features a horizontal square taper spindle interface. Before purchasing, verify that the right crank arm direction is square and confirm that the apertures of both left and right arms match for optimal performance. - Durable Construction: Made from high-quality materials to withstand regular use, ensuring longevity and reliable performance on all types of rides. - Practical Applications: Perfect for replacing worn-out or damaged crank arms, enhancing your bike's efficiency and ride quality. Suitable for both casual riders looking to maintain their bikes and serious cyclists seeking performance upgrades. - Easy Installation: Designed for straightforward installation, making it accessible for DIY enthusiasts and bike repair professionals alike. - Reliable Performance: Enhance your cycling experience with crank arms that deliver stability and precision, whether you're navigating city streets or tackling rugged trails.