SHIMANO GRX R815 Di2 2 x 11s DISC GROUPSET 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. It isn’t a reworked set of road components made for all-terrain riding, this groupset represents a ground up look at how cyclists want to explore their world. Shimano GRX helps you eliminate excuses, instead urging you to try that rough side-track or ride that little bit longer. It offers you the option to Explore Beyond. The Groupset comprises of: ST-RX815 Shifters 2 x 11-speed Dual-Control lever Anti-slip texture and brake lever coating gives higher braking efficiency and reduces fatigue on long rides 11-speed E-tube Di2 compatible FC-RX8101 - HOLLOWTECH II Crank Set - 2x11-speed Chainring combinations: 48x31T Crank lengths 170, 172.5, 175 mm CS-M8000 Cassette - 11-speed 11-tooth small cog for optimal efficiency Optimized “Sweet Spot” Gears for pedalling efficiency Compatible with 11-speed freehub bodies Size 11-30T, 11-31T, 11-34T RD-RX815 Rear Derailleur SHIMANO SHADOW Rear Derailleur Compatible with 11-speed HG chains Wide gear ratio compatible up to 11-34T For use with single chainset BR-RX810 Brakes More fine-tuned control and heightened braking performance Simple set up and maintenance with easy and clean bleeding system Shimano CN-HG701 XT/Ultegra Chain with Quick Link Shimano Battery, Charging Cable and Electric Wires This groupset comes complete with a Shimano E-Tube DN110 Internal Di2 battery, charging cable and EW-SD50 E-Tube Di2 Electric Wires as below. E-Tube DN110 Di2 Battery, 7.4V Lithium-ion, internal mount BCR2 Di2 internal battery charger direct to SM-EW90 junction SW-EW90 Stem junction box SM-JC41 internal junction box EW-SD50 E-tube Di2 electric wires PLEASE NOTE, THIS GROUPSET DOES NOT CONTAIN: Bottom Bracket Rotors