????【USEFUL DESIGN】：Hollow design style, with high-tension steel plate nickel-chromium processing, may offer you great cycling experience.
????【PREMIUM QUALITY】：Constructed of high strength aluminium alloy materials, anti-rust, non-deformation and wear-resistant.
????【EASY TO INSTALL】：Adopt simple structure, convenient to use, easy to install and remove, may firmly connect with the bike hub.
????【GOOD PERFORMANCE】：Can provide fast riding speed with less effort needed, also promise smooth rotation of chain without much noise.
????【SATISFICATION GUARANTEE】：If you are not satisfied with our product received, you can apply for unconditional return and refund within 180 days.