Shimano

GRX RD-RX827-SGS Di2 Wireless Rear Derailleur - 12-Speed, Long Cage, Shadow ES

The Shimano GRX RD-RX827-SGS Di2 Wireless Rear Derailleur brings next-level control and performance to gravel riders who demand reliability no matter how rough the route gets. Designed for 1x 12-speed drivetrains and optimized for use with a 10-51T cassette, this long cage derailleur delivers a massive gear range with the seamless precision of Di2 wireless shifting—no cables, no compromise.

Built to shrug off impacts and keep shifting flawlessly, the GRX RX827-SGS features Automatic Impact Recovery, so even after a hit, it automatically realigns to maintain smooth, accurate gear changes. The Shadow ES design tucks the derailleur in close for maximum chain stability and clearance, while the reinforced skid plate and wide-link construction add strength where it counts.

Whether racing gravel, tackling long mixed-surface routes, or exploring uncharted backroads, this derailleur keeps your drivetrain running silent, tight, and fast.

Key Features:

• Wireless Di2 shifting delivers instant, precise gear changes with zero cable clutter.
• Automatic Impact Recovery function resets derailleur alignment after a crash or knock.
• Shadow ES technology keeps the derailleur low-profile and stable over rough terrain.
• Wide link structure and solid pulleys improve durability and drivetrain stiffness.
• Removable internal battery stays secure on rugged rides and is easy to charge when needed.

For riders chasing adventure and performance in equal measure, the Shimano GRX RD-RX827-SGS Di2 Wireless Rear Derailleur is the ultimate drivetrain upgrade for confident, consistent shifting on any surface.