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

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Weights are based off pre-production products at time of publication. Weights may vary in final production.