Shimano Deore Di2 RD-M6250 12 Speed Wireless HyperGlide Rear Mech w/o Battery, SGS Cage

- Deore M6250 Shadow ES 12-speed wireless rear derailleur for the ultimate in shifting performance & durability
- Precise & clean wireless shifting with Integrated on-board removable battery (BT-DN320 sold separately)
- The integrated removable on-board battery is protected within the linkage
- Crash recovery function, absorbs impacts & returns to its original position
- Connectivity BLE, ANT private
- Shadow ES features a super low profile skid plate design & optimized slant angle for optimal clearance
- Shadow ES uses a dual spring chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive & shifting
- The Shadow ES system is also zero maintenance & has no degradation of performance
- Unique structure using two springs has a tighter chain wrap that improves shifting & security with increased spring force by 70%, allowing the chain to mesh firmly with the sprocket
- With the tighter chain wrap skipping is prevented even as the cogs wear
- 13T solid pulleys & decreased derailleur tension prevent high chain tension in low gears
- Dependable steel pulley cages
- Cold forged wide alloy links & pivot body
- Fluorine-coated link pin bushings
- Specifically designed to work with 12-speed drivetrains
- 10-51T compatible SGS cage