![Shimano GRX RD-RX812 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, For 1x - Mariposa Bicycles Shimano GRX RD-RX812 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, For 1x - Mariposa Bicycles](https://mariposabicycles.ca/wp-content/uploads/2022/02/direct_uploads2F158632FLDWu8L5CI0aerINdg6FcOg2F6cefa9bca46ec02823ede9a48b8851223579aed0.png-650Wx650H.jpg)
Shimano GRX RD-RX812 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, For 1x - Mariposa Bicycles
![Shimano's gravel-oriented GRX mechanical components features a 2x-oriented RX810 rear derailleur with a clutch that comes with oversized pulleys for more chain wrap. © A. Yee / Cyclocross Magazine - Cyclocross Magazine - Shimano's gravel-oriented GRX mechanical components features a 2x-oriented RX810 rear derailleur with a clutch that comes with oversized pulleys for more chain wrap. © A. Yee / Cyclocross Magazine - Cyclocross Magazine -](https://www.cxmagazine.com/wp-content/uploads/2019/10/shimano-grx-gravel-drivetrain-components-img_8732-cxmagazine-ay_2-750x500.jpg)
Shimano's gravel-oriented GRX mechanical components features a 2x-oriented RX810 rear derailleur with a clutch that comes with oversized pulleys for more chain wrap. © A. Yee / Cyclocross Magazine - Cyclocross Magazine -
![This morning my chain jumped off my top pulley and snapped my rear derailleur 😳. I want to replace it with s shimano GRX as I swap my wheels between a road This morning my chain jumped off my top pulley and snapped my rear derailleur 😳. I want to replace it with s shimano GRX as I swap my wheels between a road](https://preview.redd.it/s4abblelrfd61.jpg?width=640&crop=smart&auto=webp&s=7dae64fc9da34ec41d0ac326a9217cf1c9c1a49c)
This morning my chain jumped off my top pulley and snapped my rear derailleur 😳. I want to replace it with s shimano GRX as I swap my wheels between a road
![Shimano GRX RD-RX810 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, For 2x - Mariposa Bicycles Shimano GRX RD-RX810 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, For 2x - Mariposa Bicycles](https://mariposabicycles.ca/wp-content/uploads/2022/02/bee51fde8536fbadba95a434d3fd99ba2891a8f5.png-818Wx818H.jpg)