XT Di2 Wireless 12 Speed Mech RD-M8250 (No Battery)

GS (For 9-45T Cassettes): Optimized for impact survivability, the 12-speed mid-cage M8250 rear derailleur is the top choice for everyday trail riding, offering unmatched durability, quick, precise shifts and added weight savings when paired with the 9-45T compact cassette. Featuring all-new wireless Di2 shifting, automatic impact recovery, a 500% gear range and 23mm 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.

SGS (For 10-51T Cassettes): The all-new DEORE XT M8250 long-cage derailleur paired with a standard 10-51T M8200 cassette gives all types of riders the range and robustness to tackle every trail on the mountain. With built-in Automatic Impact Recovery, a new, impact- deflecting wedge shape, and simple covered-pulley solutions, this derailleur stands up to harsh trail impacts and still retains its lightning-quick shifting speed and high level of performance.

• Robust Design : A wide link structure, skid-plate design, durable aluminium 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.