Gravel cycling is something of a mystery. Although this is mostly a new phenomenon on the scene , it manages to evoke nostalgic feelings which we don't experience from modern road cycling these days. Wool knitwear , steel frames with handrails and a sense of adventure that never stops when the asphalt ends he manages to charm us with an undeniable vintage aesthetic. With that said , it's not just a matter of discarding new technologies and Shimano proves it with the GRX RD-RX817 Di2 rear derailleur which brings electronic shifting to the gravel scene rugged enough for off-road life but with silent and uninterrupted operation. Gear changes are precise and reliable regardless of the terrain ahead. Like the rest of Shimano's GRX rear derailleurs, the RX817 features borrowed from the world of mountain bikes, with a Shadow clutch mechanism which regulates chain tension to reduce chain drop and ensure silent driving over rubble.

Following in the footsteps of the updated Dura-Ace and Ultegra groups This GRX derailleur gets the Shadow Cage treatment placing it closer to the frame and under the cassette protecting it from harm and being less likely to bear the brunt of a roadside accident. This also allows the derailleur to follow a much more linear path allowing you to perform shorter throws with less effort. Model RX817 comes ready to use with a medium length separator which accommodates Shimano 11-40t and 11-42t cassettes which provides a wide range of gear ratios combined with double gearing without the usual huge jumps between teeth as on 1x. setting.

Adhering to that which is well known to brand buyers Shimano continues to use Dura-Ace, Ultegra and Tiagra designations in the GRX line that being said, this particular model falls under the Ultegra umbrella, which means that it receives the usual materials and finishes. what do we expect from recruiting groups? which is just one step from the top. His weight its smoothness and durability make it more than suitable for racing against competitors on the track or camping in the sun during a bike tour.