Description: Concave guide wheel screw Smooth/easy operation shifting performance Wide connection design for precise shifting and durability Wide connection design, dual servo structure, low-key concept Features: - Made of high-quality material, durable and sturdy, anti-scratch and wear-resistant. - The wide link design increases rigidity and using time. The 11-teeth pulleys can reduce chain noise and improve efficiency. - Easy to install and remove, convenient to use. - Suitable for mountain bikes, road bikes, cycling bikes and more. Specifications: .
