Improves Bike Efficiency Bicycle Rear Derailleur Hanger Precision Engineering Speed Change Extension Seamless Integration <br> Description: <br> Brand: ENLEE (authorization available) <br> <br> Product Name: Tail Hook Extender <br> <br> Material: aluminum alloy <br> <br> Weight: about 18g/set <br> <br> Application: 34-52T flywheel <br> <br> High-strength aluminum alloy material, CNC hollowed out and lengthened design, lightweight and beautiful <br> Specifications: <br> installation method <br> The hook extension will be screwed to the previous frame tail hook, <br> After re-use, pull out and install it on the tail hook extension seat. <br> <br> High compatibility, after the extension of the tail hook is installed, the space between the rear pull guide wheel and the large tooth is sufficient for speed change. <br> Mountain 40/42/46//5052T etc. Highway 34/36/40/42T and other flywheels. <br> Package Included: <br> 1 Extender