Ideal for cross country and general off-road trail riding, this rear mech provides fast and smooth gear shifting performance in all conditions. Key Features: Rear Derailleur for 2/3 x 6 / 7 Speed Direct Attachment Type Max. Sprockets: 32T Total Capacity: 43T Features: Model No.: RD-M21LA Cassette Compatibility: 6 / 7 Speed Front Chainring: Double / Triple Max. Sprocket: 32T Min. Sprocket: 11T Total Capacity: 43T Guide Pulley: Engineering Composite with Steel Bushing Tension Pulley: Engineering Composite with Steel Bushing Bracket Body: Resin / Black Mount Type: Reverse Bracket Type Bracket Pivot Seal: N Plate Body: Resin / Black Plate Pivot Seal: N Outer Link: Resin Steel Inner Link: Black Steel Link Pin Bushing: N Outer Plate: Black Painted Steel Inner Plate: Black Painted Steel Weight: 279g Compatibility: Shimano 6 / 7 Speed MTB Rear Derailleur Compatible
A new level of performance for Shimano 12-speed road rear derailleurs. Wide 36T-compatible 12-speed Di2 rear derailleur. Receiving the wireless shifting signal from the shift lever, the Shimano 105 rear derailleur completes a shift in the blink of an eye with its high-performance motor and optimised link structure. This is the hub of the Di2 system, with the charging port, indicator LEDs, adjustment switches and more integrated into a compact package. A low-profile design reduces damage from contact and falls.105 Shadow design with Di2 technology, shifting is easy and precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gearThe rear derailleur is now the brains of the system with wireless connectivity to the shifters. It acts as the point the system is charged, provides ANT+ connection to 3rd party devises and replaces the handlebar junctionButton on the derailleur for Di2 operations, and LED light denotes synchronized shift mode, setting mode and charge requirementsSleek appearance with Low profile Shadow design construction reduces risk of damage in a crashProgrammed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shiftThe removal of traditional mechanical cables in favour of electrical wires to the battery not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shiftsDerailleur contains a saver (fuse) function, where the inner structure is protected from strong impactsHigh tolerance cold forged aluminium link plates and body construction is extremely light and durableFour self-lubricating micro-machined fluorine-coated link pivot bushings provide low-friction shifting12-speed E-tube Di2 compatibleWide gear ratio compatible up to 11-36T