12 Speed Derailleur Groupset,4pc Mountain Bike 12 Speed Groupset Shifter Rear Derailleur 11?46T Cassette and Chain Kit Fit for Mountain Bike, Road , MTB, BMX Riding

The flywheel is made of high tensile steel plate, which is sturdy and durable after quenching process and tempering hardening treatment.

2.

Multilayer electroplating anti rust and tooth loss design, speed change is more sensitive and smooth.

3.

The shifter adopts 12 speed 1:1 technology to improve accuracy and response speed.

4.

All aluminum shift lever and the coated stainless steel wire which is 2050mm / 80.7in in length are very convenient to use.

5.

12 speed leg extended and directly mounted rear derailleur adopts a shadow rear derailleur design with an enlarged bearing guide wheel, which is compatible with up to 52T flywheels.