Shimano Ultegra RD-R8000 / R8050 & GRX RD-RX800 / RX805 / RX812 Rear Derailleur Pulley Set

Keep your high-performance drivetrain executing flawless shifts under the most demanding conditions with the original Shimano Ultegra & GRX Rear Derailleur Pulley Set. Whether you are slicing through tarmac on a road racer or grinding through thick mud on a gravel rig, worn jockey wheels lead to ghost-shifting, slow gear pick-up, and unnecessary friction.

Unlike entry-level jockey wheels, this premium set is engineered with dual sealed cartridge bearings. These bearings provide exceptionally low rolling resistance to save you precious watts, while the robust external seals lock out rain, grit, and fine trail dust. The tall, sharp tooth profiles ensure instantaneous chain engagement, whether your derailleur is mechanical or electronic Di2.

Key Features & Benefits:

• Premium Sealed Bearings ($\times2$): Both the guide and tension pulleys feature precision cartridge bearings for incredibly fluid rotation and long-lasting durability.

• Pro-Level Shifting Response: Restores crisp, precise, and instantaneous index tracking across tight road or wide gravel cassettes.

• Cross-Discipline Toughness: Built to meet the grueling demands of both premium road racing (Ultegra) and rugged all-terrain gravel exploration (GRX).

• Whisper-Quiet Chain Guide: Constructed from an advanced self-lubricating resin compound that reduces chain friction and acoustic resonance.

Product Compatibility & Specifications:

• Model: RD-R8000 / RD-RX800 Pulley Set

• Series: Shimano Ultegra R8000 / GRX 11-Speed Series

• Drivetrain Speed Compatibility: 11-Speed Drivetrains

• Compatible Road Derailleurs: Ultegra RD-R8000 (Mechanical) & RD-R8050 (Di2 electronic)

• Compatible Gravel Derailleurs: GRX RD-RX800, RD-RX805 (Di2), and RD-RX812

• Package Contents: 1 x Guide Pulley, 1 x Tension Pulley (both with integrated sealed bearings)