Features

• GRX 820 series 1x12-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 Kit | GS or SGS Rear Derailleur for 1x use, | 12s Chain | 12s 10-45T or 10-51T Cassette
• You will still need: GRX 1x 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 1x12 Speed Mechanical

• GRX ST-RX820 Right Dual Control Lever and Caliper, 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 800 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
  • Rear Flat Mount BR-RX820 hydraulic brake caliper with IceTech finned disc pads
  • Packaged SM-BH90-JK-SSR Hydraulic Hose Kit and fittings
• GRX BL-RX820 Left Brake Lever and Disc Caliper / for 1x12-speed w/ right lever-only shifting
• Left hydraulic disc brake lever for GRX 1x drivetrains
• Hood and lever shapes feature gravel specific ergonomics, texture
• Responsive lever pull 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
• GRX specific lever shape and design-won't match non-GRX 800 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 Flat Mount BR-RX810 hydraulic brake caliper; 2-piston with IceTech finned disc pads
• Features: Straight hose joint, pad axle mount, 4mm pad fixing tool size (screw fixing pin/snap ring)
• Set with SM-BH90-JK-SSR hydraulic hose system and fittings
• GRX RD-R822 GS(10-45T) or SGS(10-51T) Rear Derailleur
• Silent and uninterrupted rear shifting on rough terrain
• Longer cage and different pulley wheel sizing; for 1x 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 10-51, 10-45 12-speed Shimano MTB cassettes
• CS-M8100 12-Speed Cassette Deore XT, 10-45T or 10-51T
• Two aluminum spider arms deliver strength, at lighter weigh, with fewer individual cogs
• DYNA-SYS12 cassette delivers precise shifting even in the most demanding gearing situations
• Rhythm step gear progression offers smooth, smartly progressive cog sizes for the range
• CN-M8100-12 speed 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 durabilityFinish: GRX Gray
• Sold as a package- absolutely NO exchanges, trades, omissions; will not be broken up for sale