The XTR M9100 series of derailleurs brings a new level of drivetrain silence thank to decreased tension in the low gear position and an added bumper on the pulley cage. Larger 13T pulleys increase efficiency and chain management while compatibility with SHIMANO's new 12-speed cassettes boosts range.
FEATURES :
Enhance shifting performance
Optimized for new drive system
Silent drivetrain
Decreased rear derailleur tension at low gear position, to prevent high chain tension at low gear
