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Equipment > Components > Groups > Shimano Gravel Groups


This GRX 820 Mechanical 12-Speed kit is an Excel Sports package of several specific GRX items required to build a 2x12 drop bar bike. Drivetrain and braking-wise, this package has everything you need except items selected by rider need/preference: a crankset, 24mm Shimano compatible bottom bracket, which will be specific to your frame, and disc brake rotors. The cassette included is an 11-36T HG710 for max range with the 2x12 set-up. Given the challenge of sourcing GRX components, we are assembling these kits as items become available. Detailed information is listed below.

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  • GRX 820 series 2x12-speed mechanical shift/hydraulic disc brake components sold as a partial kit (without: crankset, bottom bracket, disc rotors)
  • Contains: Right Mechanical Shift/Hydraulic Brake Dual Control Lever, Rear Caliper, Hydraulic Hose | Rear Derailleur for 2x use, | 12s Chain | 12s 11-36T Cassette
  • You will still need: GRX 2x crankset, 24mm ID Shimano compatible Bottom Bracket that fits your frame | 2 Disc Brake Rotors (CL800 or equivalent) in your desired size(s) or another brand/model of comparable rotors
  • GRX has been strength and durability optimized for the rough surfaces, debris, dust, and rigors of gravel use
  • Levers feature ergonomic and tactile shapes and features for greater control, rider connection
  • HYPERGLIDE improves shifting both up and down the cassette, even under maximum pedaling load
  • Drivetrain features optimized progressive gearing options engineered for performance, speed without sacrificing drivetrain efficiency

Detailed Group Contents for 2x12 Speed Mechanical

  • GRX ST-RX820 Right and Left Dual Control Levers and Hydraulic Disc Calipers, either as a set, or individually packaged
    • 12-spd Dual Control Mechanical Shift / Hydraulic Disc Brake lever for GRX drivetrains
    • Same light shifting operation as Ultegra road systems, SIS indexing; optimized for durability and rider control
    • Hood and lever shapes feature gravel specific ergonomics, texture
    • Responsive lever throw actions and light but positive engagement feel
    • Raised hood head prevents hand misalignment and slippage
    • Anti-slip lever texture and brake lever coating
    • Recessed finger notch prevents upward slipping
    • Includes: Polymer-coated SS cable, OT-SP41 housing, Right lever set includes OT-RS900 loop specifically for use with rear derailleur- required for proper rear shifts
    • GRX specific lever shape and design-won't match non-GRX 820 series mechanical levers
    • Brake lever features ServoWave action, Reach Adjust, Free Stroke
    • Faster initial bite point followed by wider control area; modulate braking forces more easily, precisely
    • Calipers have refined design, improved performance from Servo Wave technology of brake lever system
    • Mineral oil fluid system, with easy to service/bleed design
    • Front and Rear Flat Mount BR-RX820 hydraulic brake calipers with IceTech finned disc pads
    • Packaged SM-BH90-JK-SSR Hydraulic Hose Kit and fittings
  • GRX RD-R820 Rear Derailleur
    • Silent and uninterrupted rear shifting on rough terrain
    • Longer cage and different pulley wheel sizing; for 2x mechanical drivetrain only
    • Shimano Shadow+ design is compact to the frame; with clutch tensioner
    • Adjustable chain stabilizer prevents chain slapping and drops
    • Gravel-tuned clutch tension for rough surfaces; with on/off feature
    • Four fluoric coated link bushings
    • Compatible with Shimano LINKGLIDE, HG 12-speed chains
    • Compatible with 11-36T, 11-34T 12-speed Shimano road/gravel cassettes
  • CS-HG710 12-Speed Cassette, 11-36T
    • Compatible with GS cage rear derailleurs
    • Offers low climbing gears perfect for mixed surface riding
    • Rider-tuned gear combination & cadence management
    • Optimal 12-speed drivetrain gear ratio
    • 12-Speed HG-EV cassette delivers great durability and improved HyperGlide shifting
    • CN-M8100 XT/Ultegra Chain
      • Directional 12-speed chain delivers smooth and reliable shifting performance
      • SIL-TEC treatment on the roller link plates and pin link plates for increased durability
      • Check out our full selection of GRX cranksets and other GRX components via the Search Box
      • Finish: GRX Gray
      • Sold as a package- absolutely NO exchanges, trades, omissions; will not be broken up for sale
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