Electronic GRX, single ring, huge range

GRX RX827 Di2 is the 1x version of Shimano's electronic gravel groupset: a wireless ST-RX825 right lever, a matching BL-RX825 left brake lever, and the long-cage RD-RX827 driving a 10-45 or 10-51T MICRO SPLINE cassette from a single chainring. One battery, one wire, no front derailleur to trim. This kit is the complete groupset with the crank; leave out anything you already have.

Kit includes

• ST-RX825 right Di2 shift/brake lever with BR-RX820 front hydraulic flat-mount caliper (J-kit, 1000 mm hose)
• BL-RX825 left brake lever with BR-RX820 rear hydraulic flat-mount caliper (J-kit, 1700 mm hose)
• RD-RX827-SGS Di2 rear derailleur, SHADOW RD+, for single chainrings (51T max)
• CS-M8100 12-speed MICRO SPLINE cassette; choose 10-45T or 10-51T
• CN-M8100 12-speed chain, 116 links, with QUICK-LINK
• BT-DN300 internal Di2 battery, EW-SD300 wire (1200 mm) and EW-EC300 charging cable
• FC-RX820-1 HOLLOWTECH II crankset (included) with 40, 42, 44 or 46T ring, in 160, 165, 170, 172.5 or 175 mm

Options

• A second EW-SD300 wire (700 mm) for frames that route the battery in two runs
• Shimano road 24 mm bottom bracket for your shell
• RT-CL800 or RT-CL700 Center Lock rotors (choose size, up to two)
• SM-MA-R160-DD flat-mount adapter for a 160 mm rear rotor
• BL-RX812 sub brake levers for the bar tops

Every part can be deselected if you already have it. The RD-RX827 is the single-ring Di2 derailleur and takes MICRO SPLINE cassettes only; for a front double see the GRX RX825 Di2 kit. The battery and wire fit inside the frame; the lever runs on a coin cell.

Tune Cycles supplies and fits Shimano Di2 across Sydney and pairs the system before handover. Choose your options above; if you are unsure what your frame or hub takes, ask us before you order.