Features: This front derailleur adapter clamp allows easy conversion from single to double chainwheel setups compatible folding bikes, enhancing gear versatility. Made from high strength aluminum alloy, it features a precise clamp diameter, adjustable screw, and a light weight build to ensures durability and great performances. Designed for riders who upgrade their folding bikes for competitive event or daily commutes, it caters to users seeking safe modifications for improved efficiency. Ideal for city commuting, mountain trail, or long distances tours where stable gear shifting is essential, this bikes modification clamp performs reliably in varied terrains and weather conditions. With tool frees installation, this folding bike part simplifies upgrades while maintaining bike weight balances, offering a hassle frees solution for enhanced riding experiences. Specifications: Materials: Aluminum Alloy Color Optional: 4 Color are Available as Shown in the Picture. Package Weight: approx.122g Size: approx.7.8x5x4.5cm/3.07x1.96x1.77in Package Includes: 1Pc Bike Front Derailleur Adapter note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!