The Shimano GRX RD-RX812 is a premium, top-tier gravel derailleur engineered specifically for 1x11/2x11-speed drivetrains. Built to handle rough, loose, and mixed-terrain riding, it features an integrated chain stabilizer to eliminate chain slap and dropping, providing silent, crisp, and uninterrupted shifting.
Key Technical Specs:
Drivetrain Compatibility: 1x11/2x11 -Speed setups only (optimized for Shimano GRX, Ultegra, or 105 11-speed dual-control shifters).
Cassette Range Compatibility: Designed for wide-range mountain or mixed-surface blocks:
Minimum Low Sprocket: 40T
Maximum Low Sprocket: 42T (Perfect match for an 11-40T or 11-42T setup)
Top Sprocket Max/Min: 11T
Average Weight: 267g
Total Capacity: 31T
Link Pivot Bushings: 4 fluorine-coated bushings for smooth, low-friction articulation.
Product Highlights:
Shadow RD+ Chain Stabilizer: Features an adjustable on/off clutch mechanism. Engaging the switch vastly increases spring tension to stabilize the cage, eliminating chain bounce, noise, and ghost-shifting over rugged gravel sectors or singletrack.
Gravel-Tuned Clutch Tension: Pre-set with firmer stabilization forces compared to standard mountain bike designs, compensating perfectly for the quick, sharp movements of drop-bar configurations.
Shadow RD Low-Profile Design: A super lean architectural profile tucks the derailleur body close to the frame under the cassette, safeguarding it against track-side hazards, rocks, and tight brush.
Pricing & Availability:
Price: 14,500 KSh 9,500Ksh
Condition: Brand New / Pristine condition (flawless faceplate and pulleys, as pictured).
