Shimano GRX RD RX812 rear derailleur
Shimano GRX, the new gravel components designed for 11-speed drivetrains and cassettes up to 42 teeth. With the new 48/31-tooth crankset, the GRX components offer a wide gear range for a variety of applications, from gravel and cyclocross to touring. Shimano GRX, the first gravel-specific component family designed equally for speed and safe bike handling on loose surfaces, is the result of an intensive and extensive research, testing and development process that incorporated information and feedback from countless riders who are out and about on trails, forest tracks, gravel roads or tarmac. Whether it’s gravel riding in the strictest sense, road bike adventures off-road, bikepacking, commuting or the demands of competitive cyclocross riders: Shimano’s GRX components offer countless options that leave nothing to be desired, from gear ratios and spacing, customisable ergonomics and integrated control of dropper seatposts right through to specific gravel wheelsets with wider rim profiles.
Shimano GRX Rear Derailleur RD-RX812:
The Shimano RD-RX812 is designed for 11x1 drivetrains with a maximum cassette size of 42 teeth. The GRX rear derailleurs are characterised by quiet, smooth, precise and reliable shifting, even on the most demanding terrain, thanks primarily to the chain stabilisation system known as Shadow RD+. The new GRX rear derailleurs now feature the Shimano Shadow RD+ stabiliser mechanism, which stabilises the chain particularly on rough, uneven surfaces. As with Shimano mountain bike rear derailleurs, the switch for this Shadow RD+ friction damper is located on the top of the rear derailleur body. In the ‘On’ position, the forward and backward movement of the derailleur cage is extremely restricted, thereby reducing chain slap and the risk of the chain coming off or mis-shifting, as well as minimising noise.
Shimano GRX RD-RX812 Rear Derailleur Technology:
- Application: Gravel, Cross, Touring
- 11x1 speed for cassettes with 11-40 and 11-42 teeth
- Material: Aluminium
- Shifting range front and rear: 31 teeth
- Max. largest sprocket: 42 teeth
- Min. largest sprocket: 40 teeth
- Max. smallest sprocket: 11 teeth
- 13-tooth derailleur pulley
- Weight: 267g (manufacturer’s specification)
- Compatible with all mechanical Shimano 11-speed STI shifters: GRX, Dura-Ace, Ultegra, 105
Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com
