Shimano GRX RX820 groupset 1x12 42

The Shimano GRX RX820 1x12-speed complete groupset with 42-tooth chainring - unbeatable and unstoppable

The Shimano RX820 is a gravel-specific 1x12-speed groupset with a 42-tooth chainring and mountain bike cassette. The single-chainring setup suits anyone who likes to keep things simple and wants an all-purpose crankset for exploring, racing, high-speed sections, and mountain crossings. Pair it, "Unbeatable" style, with a 10-45-tooth cassette if you're a competitive type who values saving weight. Or go "Unstoppable" with a 10-51-tooth cassette if you love adventures with steep climbs and comfort matters most to you. Either way, you benefit from the reliability, durability, and simplicity of the GRX RX820. With this groupset, Shimano has once again broadened the range of its gravel components, to match the spirit, individuality, and sense of freedom and community shared by gravel enthusiasts. The complete groupset also includes a right-hand shift lever, a left-hand brake lever, the matching rear derailleur, a quick-link chain, and flat-mount disc brakes.

Specifications: Series: GRX RX820 Application: Gravel Drivetrain: 12-speed (mechanical) Brakes: Disc, hydraulic (Flat Mount) Components: Crank: 170.0 mm, 172.5 mm, 175.0 mm (42-tooth chainring) Cassette: 10-45, 10-51 Rear derailleur: short/medium cage (10-45), long cage (10-51) Compatibility: Shimano Micro Spline freehubs (Shimano MTB 12-speed) Features: mechanical-hydraulic GRX 12-speed groupset for gravel use (42-tooth crank, cassette, chain, rear derailleur, shift lever, brakes) simple, reliable, low-maintenance 1x setup MTB cassette with 10-45 or 10-51 teeth depending on riding style light and efficient Hollowtech II crank with hollow-forged crank arms smooth, precise shifting excellent brake control on changing terrain gravel-specific lever and grip ergonomics rear derailleur with Shadow Plus technology against chain drop 126-link chain Scope of delivery: Shimano GRX RX820 1x12 42 complete groupset, consisting of:

1 x Shimano GRX crankset (FC-RX820) 1 x Shimano GRX rear derailleur (RD-RX822) 1 x Shimano XT cassette (CS-M8100-12) 1 x Shimano XT / Ultegra Quick-Link chain (CN-M8100) 1 x Shimano GRX disc brake (BR-RX820 + BL-RX820), front 1 x Shimano GRX disc brake (BR-RX820 + ST-RX820), rear 1 x Shimano SM-BH90-JK-SSR brake hose 1000 mm (front) 1 x Shimano SM-BH90-JK-SSR brake hose 1700 mm (rear) 2 pairs of Shimano Resin brake pads with cooling fins 1 x disc brake adapter for front 140/160 + 160/180 mm 2 x hose connector kits 2 x type A mounting bolts for front 2 x mounting bolts for 25 mm frame diameter for rear 1 x Shimano aluminum cassette lockring 1 x Shimano quick-link 1 x Shimano crank bolt 1 x shift cable 2 x outer housing for rear 1 x Shimano OT-RS900 outer housing for rear derailleur 1 x extended end cap for OT-RS900 Brake set ready to install, pre-filled; bleeding is recommended after installation Order directly alongside: Bottom bracket: SM-BBR60 or SM-BB72-41B Pressfit Hollowtech II recommended 2 x brake rotor (140, 160, or 180 mm): RT-CL800 recommended

Optional accessories available:

FM-to-FM brake adapter SM-MA-R160 D/D for 160 mm rotor on 140 mm FM frame, for rear FM-to-FM brake adapter SM-MA-R160 D/D for 180 mm rotor on 160 mm FM frame, for rear Type C bolts for 10/15/20/30/35 mm frame diameter Type C2 bolts for 10/15/20/30/35 mm frame diameter K05S-RX resin pads L04C-MF metal pads with cooling fins