- Optimized for new drive system
 - 10-45T (1x12-speed)
 - 10-45T (2x12-speed)
 - Decreased rear derailleur tension at low gear position, to prevent high chain tension at low gear
 - Add bumper at rear derailleur pulley cage
 - Bigger 13T pulley
 
- Enhance shifting performance
 - Silent drivetrain
 - Low profile design
 - Low sprocket combination
 

















