Derailleur Hanger Extension, Rear Derailleur Extension, Bicycle Rear Derailleur Hanger Extension Frame Gear Tail Hook Extender Derailleur Hanger Extension (Black)

【Durable to Use】 - This bicycle rear derailleur hanger is made of high-quality aluminum alloy with CNC machining, making it sturdy, firm, durable, and corrosion-resistant. 【Fit for】 - It is used to extend the rear derailleur chain and is compatible with 40T, 42T, 44T, 46T, 50T, and 52T mountain bike freewheels. 【Easy to Use】 - Makes the flywheel shifting smoother. 【Easy to Install】 - Easy to install and remove. 【Practical Accessory】 - Excellent accessory for cycling enthusiasts. Note: All data is measured manually; please allow for a 1-3 cm error due to manual measurement. Due to differences in lighting and display settings, there may be slight color variations; please refer to the actual item received.