Features: Upgrade your folding bikes performances with this rear derailleur extender, specifically engineered to 11-34T flywheels to ensures precise gear transiting. Featuring a 12.5mm extension design and alloy construction, this component strengthens derailleur alignment while resisting wear, corrosions, and impacts. Ideal for mountain cyclists, road riders, and city commuters requiring safe gear shifting precisions in challenging terrains or high speed cycling scenarios. Adapts to climbing, rapid descents, or daily commutes by optimizing rear derailleur positioning for smoother gear changes and reduced chain slippage. Designed with tool frees installation and standard designs, this extender delivers a faster shifting response while meeting strict mounting specifications. Specifications: Materials: Alloy Color: As The Picture Shows Package Weight: approx.25g Size: approx.2.6x2.28x1.35cm/1.02x0.89x0.53in Package Includes: 1Pc Rear Derailleur Extender 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!