Shimano Ultegra RD-R8150 Di2 12-Speed Rear Derailleur Outerwear from wide 3/16" single-speed* to

from wide 3/16" single-speed* to narrow 12 and 13-speed

•Forged aluminum lever blade

IFC01 Computer mount interface

The Origami Front Fender is super light

Shimano Ultegra RD-R8150 Di2 12-Speed Rear Derailleur Outerwear from wide 3/16" single-speed* toXTR Rear Derailleur Medium Cage SHIMANO SHADOW RD+ 12 speed 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