- Compatibility: Designed specifically for BAFANG mid drive motors (BBS01, BBS02, BBSHD, M200) and Tongsheng mid drive motors, ensuring a perfect fit for your electric bike setup. - Installation Note: This crank arm features a diamond taper interface. Ensure your original crank arm has a diamond hole for compatibility. Each crankset is marked with L/R for easy identification of left and right sides during installation. - 170MM Size: Tailored for electric bicycles, the crank arm measures approximately 21 x 3.8 cm (8.27 x 1.5 inches) and weighs about 450g, providing a sturdy yet lightweight option for your ebike. - User-Friendly Design: The crank arm's simple design allows for an easy installation process on mid drive motor systems, making it accessible for both experienced and novice users. - Practical Applications: Ideal for upgrading your electric bike's performance, replacing worn-out crank arms, or customizing your bike for enhanced efficiency. This crank arm supports smooth pedaling and improved power transfer, making your rides more enjoyable. - Durable Construction: Crafted from quality materials, this crank arm ensures longevity and reliable performance under various riding conditions. This crank arm is an essential component for enhancing your electric biking experience, providing reliability and ease of use for any cyclist.