Upgrade your biking gear with the 104BCD 42T Bike Chainring Chain Wheel Gear Adapter from Karlak. This product is specifically designed for mid-drive motors such as M400, M300, M200, M215, M410, M315, and M420.

The 42T mid-motor chainring comes with a protective disc that ensures a stable and smooth chain operation, protecting your bike frame from scratches. Its innovative positive and negative tooth design effectively prevents the chain from falling off, offering a secure riding experience.

Constructed with chrome vanadium steel chainring and aluminum alloy protective disc, this gear adapter is not only lightweight but also durable, wear-resistant, and rust-proof. Enjoy a hassle-free installation process and ride burden-free with this high-quality product.