Tighter gear steps across the cassette make 2x drivetrains appealing for riders who want range without the big jumps between cogs that wide-range 1x systems require. The Shimano GRX-810 Mechanical 2x 11-Speed Kit bundles the shifting, braking, and gearing components for a cable-actuated gravel build with hydraulic discs. This is a partial kit, so you'll still need a 2x crankset, bottom bracket, and disc rotors to complete the drivetrain, but the core components that are often difficult to source individually are covered here.

Both sides get ST-RX810 dual control levers with integrated shifting and hydraulic brake actuation. GRX lever hoods use gravel-specific shapes with raised heads that prevent your hands from sliding forward on rough terrain, plus textured surfaces on the hoods and brake levers for grip in wet or dusty conditions. The recessed finger notch on each lever keeps your hands from creeping upward during descents. Shifting feel matches Ultegra-level smoothness with SIS indexing, and the kit includes polymer-coated stainless cables, OT-SP41 housing, and the OT-RS900 loop required for proper rear derailleur actuation.

The brake system uses ServoWave action for a faster initial bite point followed by a wider modulation zone, which helps you fine-tune braking force on loose or variable surfaces. Reach adjust and free stroke settings let you dial in lever position and engagement point to fit your hand size and preference. The flat mount BR-RX810 calipers use a mineral oil system with IceTech finned pads, and the kit includes SM-BH90-JK-SSR hydraulic hose and fittings for both front and rear.... Read More