Optimized for impact survivability, the 12-speed long-cage M8250 rear derailleur is the top choice for everyday trail riding, offering unmatched durability, quick and precise shifts, and added weight savings when paired with the 10-51T compact cassette. Featuring all-new wireless Di2 shifting, automatic impact recovery, a 500% gear range, and 23 millimeters of additional ground clearance for a bash-free ride, the M8250 rear derailleur is built to be relentlessly reliable so you are free to focus solely on the trail ahead.
- Robust Design: A wide link structure, skid-plate design, durable aluminum plate and solid pulley add robustness and longevity.
- RD Protection Function: The new Automatic Impact Recovery function instantly returns the derailleur to its original position after impact.
- SHIMANO SHADOW ES: A slimmer, stronger evolution of SHIMANO's pioneering chain-stabilizing SHADOW RD+ Concept.
- Precise & Clean Wireless Shifting: Pinpoint, ultra-fast shifting, and a no-sacrifice 500% gear range.
- Protected Battery: Tucked safely inside an enclosed space, the battery won't budge even in rough terrain, while remaining easily removable for charging.
- Covered Pulleys/Cage: The solid pulley and shielded pulley teeth prevent trail debris from jamming up your flow.
- Total capacity: 41T
- Low sprocket: Max.: 51T, Min.: 45T
- Top sprocket: Max.: 10T, Min.: 10T
- Fluoric coated link bushings
- Guide pulley bearing: Sealed bearing
- Tension pulley bearing: Sealed bearing
- Teeth: 13
- Sunken type pulley screw: TBD
- Di2 connectivity wireless
- Di2 shifting
- Bluetooth® LE custom (*1)|Adjust mode information
- Bluetooth® LE custom (*1)|Di2 battery level
- Bluetooth® LE custom (*1)|Gear position
- Bluetooth® LE custom (*1)|SHIMANO E-BIKE SYSTEMS data items (*3)
- Bluetooth® LE custom (*1)|Compatible with E-TUBE RIDE
- Bluetooth® LE custom (*1)|Compatible with E-TUBE PROJECT
- ANT private (*2)|Adjust mode information
- ANT private (*2)|Di2 battery level
- ANT private (*2)|Gear position
- ANT private (*2)|SHIMANO E-BIKE SYSTEMS data items (*3)
- LED for system status
