Rear Derailleur Shimano GRX RD-RX812 Shadow + 1x11V

Adopting the technology introduced in 2018 on the RX mod, the Di2 (RD-RX815 / RX817) and mechanical (RD-RX810 / RX812 / RX600) rear derailleurs offer a smooth, quiet and reliable gear change on the terrain accidents with the SHADOW RD + system which stabilizes the chain. The GRX range offers four tailors depending on the cassette and the toothing chosen by the cyclist.

Cyclists using an Ultegra, 105 or Tiagra level cassette in 11-30 / 34 teeth will choose the classic Di2 RD-RX815 or mechanical RD-RX810 rear derailleur while cyclists having opted for a Deore XT, SLX cassette or Deore level, in 11-40 / 42 teeth will choose the long screed Di2 RD-RX817 or mechanical RD-RX812 mod, each of whose mod offers them an identical draft to road tailers.

Details:

• 1×11 speed compatible.
• Max teeth: 42 teeth.
• Total capacity: 31 teeth.
• Weight: 264g
• Reference: IRDRX812

MORE INFORMATION

How to adjust a rear derailleur.

How to change a rear derailleur.