SHIMANO GRX Di2 RD-RX827 1x12-SPEED REAR DERAILLEUR

The Shimano RD-RX827 GRX Di2 rear derailleur combines cutting-edge wireless shifting with gravel-specific durability.

Featuring SHADOW ES technology, this 12-speed component delivers a low-profile design that minimizes impact exposure through its integrated chain stabilizer unit. The SGS long-cage configuration handles demanding terrain with precision, while advanced engineering—including dual-spring chain stabilization and reinforced alloy construction—ensures reliable performance in harsh conditions. Built for adventure cyclists seeking dependable, maintenance-free shifting on any surface.

Features

• SGS long cage for 10-51 cassette: Speed paired with range; the long cage rear derailleur withstands hard impacts on the trail and scores with lightning-fast shifting speed and top-class performance at the same time
• Low Profile Design: SHIMANO SHADOW ES technology delivers a wedge-shaped design that reduces the derailleur’s front-facing surface area and eliminates edges that could catch on rocks and road debris
• Automatic Impact Recovery Function: The derailleur absorbs impacts and then automatically resets the rear derailleur, ensuring continued performance
• Super Strong Design: The rear derailleur body boasts a wide, well-braced linkage and solid pulleys to minimize debris entry and ensure durability
• New Chain Stabilizing Technology: The dual spring design creates higher chain tension for better chain wrap and retention
• Battery Protection: Tucked safely inside the rear derailleur body, the sealed battery won’t budge even in the roughest terrain but is still easily removed for charging
• RD-RX827 – Wireless Rear Derailleur:
  • SHIMANO SHADOW ES Technology
  • Precise wireless shifting
  • Robust structure with skid plate design
  • Solid pulley construction
  • Removable and rechargeable onboard battery
  • 700km to 1,000km range depending on riding conditions (435 to 621 miles)
  • Long Cage RD-RX827 SGS for use with SHIMANO 10-51T 12-speed cassettes
  • 449 grams
  • LED status display

Specification