Di2 11-speed. The world’s first dedicated components for gravel adventure ... Shimano Ultegra Di2 Rd-6870 Rear Derailleur 11 … Shimano GRX Di2 Components: Getting Rolling – by MG. We’ve been talking about Shimano’s new GRX components for nearly five months now. The mechanical GRX RX800 series follows with RX810 (2x) and RX812 (1x) rear derailleurs, RX810 mechanical STI levers, and the RX810 front derailleur. Wheelsets. Brake / shift levers. Front derailleurs. Free shipping on many items ... Shimano GRX RD-RX812 Rear Derailleur Direct Mount (1x11 Speed) IRDRX812. Shimano’s new GRX Di2 RX815 gravel / cyclocross Di2 2x rear derailleur accepts rear cogs up to 34t. It represents a ground up look at how cyclists want to explore their world. The world’s first dedicated components for gravel adventure. SHIMANO GRX DI2 RDRX815 REAR DERAILLEUR ELECTRONIC SHIFTING FOR 2X11 One thing is for sure and that is both gravel riding and electronic drivetrains are rapidly growing in popularity. You can run Shimano 11-42 cassettes, or 11-40 for those who want a bit tighter range. All of the new rear derailleurs use Shimano’s Shadow RD+ design with an adjustable clutch to increase chain retention. Working in conjunction with the new groupsets is a new range of rear derailleurs. Back in September, we introduced you to our review of the GRX 800 mechanical (2x) group. That is not endorsed by Shimano but it works flawlessly in our lab and outside. ... Shimano has launched GRX for the masses. You can even run a SRAM 10-42 cassette. Ergonomics Addressed Shimano decided to combine these two categories to create the Shimano GRX Di2 RDRX815 Rear Derailleur. 600 series. Explore Beyond. 1x gearing: TheRX-812 rear derailleur (RX-817 for Di2) is specifically for 1x and can handle up to 42T for the biggest cog. Mechanical 10-speed. The fifth option is the RX400 rear derailleur for the 2×10 speed group with a max cassette range of 11-30 to 11-36t, and max front chainring range of 16t with a 41t total capacity. ... Cranksets. Browse drivetrain. The Di2 option isn’t significantly chunkier than its … The Shimano Ultegra RX Di2 rear derailleur is a component that’s time has come Eric Wynn A lever allows the Shadow Plus system to be turned on … The Ultegra-equivalent RX810 takes over from the existing Ultegra RX derailleur Shimano. Disc brakes. Shimano’s GRX group offers clutch-based chain security, or as Shimano officially calls it, “integrated chain stabilizer mechanism,” both for 1x and 2x. Change language. Rear derailleurs. Shimano introduced the Shadow Plus system on mountain bike rear derailleurs in 2011.It is designed to reduce chain slap and improve chain … $93.80. Shimano GRX Di2 FD-RX815 Front Derailleur x1; Shimano GRX Di2 RD-R815 Rear Derailleur x1; Shimano GRX Di2 ST-RX815 Hydraulic Disc Brake Dual Control Levers set x1; BH90-JK-SSR Hose Kit With BR-RX810 Flat Mount Brake Calipers (The brake pads are Resin L03A) x1; Shimano Di2 SM-EW90-A 3-Port Junction A x1; Shimano Di2 SM-JC41 Internal Junction B x1 Each series scores an individual derailleur option depending on whether users opt for mechanical, di2, 10-speed or 11-speed. It is a gravelspecific rear derailleur that shifts electronically. It isn’t a reworked set of road components. There’s also dedicated wide-range 1x options which allow riders to use 11-speed 11-40t and 11-42t cassette options. RX800 rear derailleurs are available in both mechanical or Di2 configurations. Get the best deals on Shimano Bicycle Rear Derailleurs when you shop the largest online selection at eBay.com. 800 series. SHIMANO GRX - DI2 - Rear Derailleur - SHIMANO SHADOW RD+ - 42T max low sprocket - 11-speed With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. Browse by series. The new group offers three tiers, lower gears, better braking from the hoods, clutched rear derailleurs, and mechanical or Di2 versions. 400 series. SHIMANO GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world. Shimano GRX rear derailleurs. RD-RX815/RD-RX817 (Di2) Shimano GRX rear derailleurs are available in short (30-34T low) or long cage (40-42T low) options for use with either road or mountain bike cassettes depending on the ideal range.