Shimano GRX RX827 1 x 12 Speed Di2 GroupsetShimano GRX RX827 1x12 Speed Di2 Groupset The Shimano GRX RX827 1x12 Speed Di2 groupset is purpose built for gravel riding, delivering precise electronic shifting, exceptional chain control, and reliable performance across mixed terrain. Designed for riders who demand simplicity, durability, and race ready technology, RX827 is ideal for gravel, adventure, and all road bikes. GRX Di2 Dual Control Lever The 12 speed SHIMANO GRX Di2 DUAL CONTROL LEVER

Shimano GRX RX827 1x12 Speed Di2 Groupset

The Shimano GRX RX827 1x12 Speed Di2 groupset is purpose-built for gravel riding, delivering precise electronic shifting, exceptional chain control, and reliable performance across mixed terrain. Designed for riders who demand simplicity, durability, and race-ready technology, RX827 is ideal for gravel, adventure, and all-road bikes.

GRX Di2 Dual Control Lever

The 12-speed SHIMANO GRX Di2 DUAL CONTROL LEVER delivers fast, wireless shifting for gravel and mixed-terrain riding. The ergonomic lever features raised hoods, ribbed surface texture, and an anti-slip coating on the brake lever for increased security and control. The hood body is newly optimized for seamless integration with flared handlebars while retaining the gravel-specific third button location. To complete the cockpit, RX825 levers are compatible with three satellite shifter options and feature SHIMANO FRONT SHIFT NEXT functionality to maximize rider customization options. 3 to 4 years of battery life with easy-to-change CR1632 shifter batteries (Initial shifter batteries may have a shorter battery life than stated above.)

GRX Di2 REAR DERAILLEUR 1x12s

The all-new GRX RX827 rear derailleur paired with a 10-51T cassette gives riders and racers the speed, range, and robustness to pursue any gravel challenge. With built-in automatic impact recovery, an impact-deflecting shape, and solid pulleys, this derailleur stands up to hard impacts and still retains its lightning-quick shifting performance.

GRX CRANKSET - 1x12s

The SHIMANO FC-RX820-1 crank balances weight savings, optimized efficiency and an array of gearing options that cater to the segmented demands of mixed-terrain riding. By pairing a 10-45T or 10-51T cassette with 40T and 42T chainrings, riders can choose closer gear steps or ultimate range. The FC-RX820-1 comes in 170, 172.5, and 175 mm crank arm lengths, providing an additional level of customization.

GRX - FLAT MOUNT - BRAKE CALIPER

The GRX BR-RX820 disc brake caliper brings a new level of control to gravel cycling with enhanced modulation and a quicker initial braking point. And despite its smaller construction, the system is quieter and easier to maintain.

Key Features

• 1x12-speed electronic Di2 shifting system
• Optimised for gravel, adventure, and all-road riding
• Wireless Di2 technology for fast, precise gear changes
• Enhanced chain stability for rough terrain
• Ergonomic GRX-specific controls for comfort and control
• Designed for reliable performance in all conditions

What’s Included

• Rear Derailleur: Shimano GRX RD-RX827 Di2 Wireless SGS Single
• Shift / Brake Levers: Shimano GRX ST-RX825 2x12 Di2 Shifters
• Brake Calipers: Shimano GRX BR-RX820 hydraulic disc calipers (front & rear)
• Cassette: Shimano 12-speed cassette (typically CS-M8100 or CS-M7100, 10–51T)
• Chain: KMC 12 Speed
• Crankset: Shimano GRX FC-RX820 1x12 
• Di2 Battery: Shimano BT-DN320 Di2 Wireless Rear Derailleur Battery
• Battery Charging: Shimano EC-DN100 Di2 Wireless Rear Derailleur Charger
• Brake Hoses: Shimano SM-BH90 series (lengths vary)

Not included: Brake rotors, bottom bracket.