Within the application, Shimano states: "While a bicycle travels on uneven terrain, it is possible for the chain guide of the rear derailleur to hit rocks, ground and so on.

Shimano is not yet talking about this clutch derailleur - which, notably, works with two chainrings - but BikeRadar talked to Trek-Segafredo riders and staff about their experience with the product.

The New Clutch-Based Shimano RX Rear Derailleur. The new Ultegra RX derailleur comes in mechanical RD-RX800-GS and Di2 RD-RX805-GS models. Both use the company’s Shadow technology and have the same ...

You can’t hurt what you can’t hit—the XTR M9250 rear derailleur with new SHIMANO SHADOW ES technology is stronger than ever and features a low-profile wedge design. The stabiliser unit blends ...

Paul Townsend in the UK recently sent us his modification to a Shimano Ultegra Di2 rear derailleur, having set it up with a clutch mechanism to make it more reliable for single chainring (1X) use.

The RD-M8250 wireless rear derailleur comes in GS – for use with 9-45T cassette – and SGS – for use with 10-51T Cassette. For e-bike riders, RD-M8260 comes as Long Cage SGS, which supports both ...

Some of our bikes don’t even have indexed shifters. The only derailleur that required extra service was the Shimano Rapidfire shift levers on my mtn bike, and that was just a clean and re-lubricate.