Shimano GRX Di2 RX815 2x11 31-48 Groupset

With the Shimano GRX Di2 RX815 2x11 groupset, you are breaking new ground

The Shimano GRX Di2 RX815 2x11 electronic groupset is the result of two years of close collaboration with gravel enthusiasts from around the world. It consists of a 2x crank (31-48 T), Di2 front derailleur, Di2 rear derailleur, disc brake with STI Di2 shift lever left and right, chain and cassette. Shimano didn't want to tell the Gravel specialists what to ride, but asked them what they wanted instead. Many unpaved paths were explored, off-road races contested, bikepacking tours undertaken, a lot of dust swallowed and mud bath galore. The result is the world's first Gravel-specific electronic component groupset, the GRX Di2 by Shimano.

Are you interested in the GRX series? Then have a look at our Shimano gravel site. You will find many more products there.

Information regarding the return of batteries and electrical equipment:

Information on the return and disposal of used batteries and electrical equipment can be found here.

Specifications:

Series:

GRX Di2 RX815

Application:

Gravel, Cyclocross, City & Touring

Shifters & Derailleurs:

2x, 11-speed (electronic)

Brakes:

disc, hydraulic (flat mount)

Components:

Crank:

170.0 mm, 172.5 mm, 175.0 mm (gradation 31-48)

Cassette:

11-30, 11-32, 11-34

Front Derailleur:

braze-on

Rear Derailleur:

short (mid) cage

Features:

• internal cable routing (only for specifically designed frames)
• internal battery mounting (seatpost adapter required)
• electrical junction box (junction A): internal (frame or handlebar) or external (under the stem)
• with wireless unit for wireless transmission of information on gear selection, battery status, etc. to a suitable bike computer or information display

Additional Components Needed:

The following components are required to use the GRX Di2 R815 groupset:

• Bottom Bracket: Shimano recommends SM-BBR60 or SM-BB72-41B Pressfit Hollowtech II.
• 2 x RT-MT800 brake rotors (140, 160 or 180 mm)
• with external distributor (SM-EW90-A), installation under the stem: 6 x EW-SD50 power cables (2 x for STI, 1 x for SM-JC41 = Junction B, 1 x for front derailleur = FD, 1 x for rear derailleur = RD, 1 x for battery)*
• with internal distributor (EW-RS910), installation in handlebar end: 5 x EW-SD50 power cables (1 x for STI, 1 x for SM-JC41 = Junction B, 1 x for front derailleur = FD, 1 x for rear derailleur = RD, 1 x for battery) + 1 x EW-JC130 Y-cable junction box (connection between EW-RS910 = Junction A with STI and SM-JC41 junction box)**
• with internal distributor (EW-RS910), installation in the frame prepared for this purpose: 5 x EW-SD50 power cables (1 x to EW-RS910 = junction A, 1 x to SM-JC41 = junction B, 1 x to front derailleur = FD, 1 x to rear derailleur = RD, 1 x to battery) + 1 x EW-JC130 Y-cable junction box (connection between EW-RS910 and STI)***
• rubber grommets for internal cable routing
• if necessary, FM-to-FM brake adapter SM-MA-R160 D/D for 160 mm brake rotor with 140 mm FM frame or SM-MA-R160 D/D for 180 mm brake rotor with 160 mm FM frame
• option: extra brake lever BL-RX812 for in-line mount on top of handlebars
• option: Bolts for 10/15/20/30/35 mm frame diameter

* To determine the correct cable lengths, the bike must be measured as follows:

• Length of down tube = distance between bottom bracket and stem
• Distance between bottom bracket and front derailleur
• Distance between battery and bottom bracket
• Distance between rear derailleur and bottom bracket
• Distance between shifters (STI) and stem centre

** For the correct cable length the following frame measurements are needed:

• Length of down tube = distance between bottom bracket and wireless unit
• Distance between bottom bracket and front derailleur
• Distance between battery and bottom bracket
• Distance between rear derailleur and bottom bracket
• Distance between bar end and the next shifter (STI)

For Y-cable: 1. distance between stem and bar end with EW-RS910, 2. distance between stem and STI on the side without EW-RS910 (3. . = distance between stem and wireless unit, compare this to the cable length of EW-JC130 Y-cable junction box

*** For the correct cable length the following frame measurements are needed:

• Length of down tube = distance between bottom bracket and wireless unit or EW-JC200
• Distance between bottom bracket and front derailleur
• Distance between battery and bottom bracket
• Distance between rear derailleur and bottom bracket
• Distance between wireless unit and EW-RS910

For Y-cable: 1. distance between stem and left STI, 2. distance between stem right STI (3. . = distance between stem and wireless unit, compare this to the cable length of EW-JC130 Y-cable junction box

You can find more information on dimensions and assembly in the Shimano manual or contact our service staff.

Contents:

The Shimano GRX RX815 Di2 groupset includes:

• 1 x Shimano GRX crankset (FC-RX810-2)
• 1 x Shimano GRX Di2 rear derailleur (RD-RX815)
• 1 x Shimano GRX Di2 front derailleur (FD-RX815)
• 1 x Shimano Di2 battery (BT-DN110)
• 1 x Shimano Di2 battery charger (SM-BCR2)
• 1 x Shimano junction box (EW-RS910 internal or SM-EW90-A external)
• 1 x Shimano SM-JC41 internal junction box
• 1 x Shimano EW-WU111 wireless unit
• 1 x Shimano Ultegra cassette (CS-R8000) or CS-HG800-11 (11-34)
• 1 x Shimano Ultegra / XT Quick-Link chain (CN-HG701-11)
• 2 x Shimano GRX BR-RX810 + GRX Di2 ST-RX815 disc brakes, front & rear
• 1 x Shimano SM-BH90-JK-SSR brake hose, 1000 mm (front)
• 1 x Shimano SM-BH90-JK-SSR brake hose, 1700 mm (rear)
• 2 x pairs Shimano brake pads
• 1 x front disc brake adapter
• 2 x hose connection set w/ olives and pins
• 2 x type A caliper bolts (front)
• 2 x caliper bolts for 25 mm frame diameters (rear)
• 1 x Shimano TL-EW02 plug tool (rear)
• 1 x Shimano USB Y-7FJ00020 charging cable
• 1 x Shimano 1.85 mm cassette spacer for road freehub (only for 11-34)
• brake set ready for assembly, filled, bleeding is recommended after assembly