Keenso Derailleur Hanger Extension, Bicycle Rear Extender Bike Extension Frame Tail Hook for 34T 52T(Black)

【Compatible For】 28.9mm center distance greatly enhances compatibility and is easily compatible for mountain 40/42/46/50/52T and for road 34/36/40/42T. 【High Performance】The structure is upgraded, accurate adjustment and increase the response speed of variable speed. Abolish the limit position, increase the fine-tuning range and make it easier to adjust. 【Strong, and Has Long Life】Hollow out style, lightweight and beautiful while ensuring strength. The rear derailleur hanger is made of High-quality material, it is strong, and has long life. 【Total Length 50.8mm】The total length of the bicycle rear derailleur hanger is only 50.8mm, achieving high compatibility and stability (too short center distance affects compatibility; too long center distance affects stability). 【High Quality】The tail hook fitting adopts radial grooves to increase friction and solve the problem of looseness caused by vibration during riding. The locking screw made of 7075 aluminum alloy, and the locking torque is greater.