Specifications:
Series: Ultegra Di2 R8050
Application: Road
Gearing: 2x, 11-speed (electronic)
Brakes: disc, hydraulic (flat mount)
Components:
Crankset: 170.0 mm, 172.5 mm, 175.0 mm (gradation 36-52)
Cassette: 11-25, 11-28, 11-30, 11-32, 11-34
Front Derailleur: braze-on
Rear Derailleur: short cage (11-25, 11-28, 11-30) or (mid)long cage (11-32, 11-34)
Additional Components Needed:
The following components are required to use the Ultegra Di2 R8050 groupset:
– Bottom Bracket: Shimano recommends SM-BBR60 or SM-BB72-41B Pressfit Hollowtech II.
– 2 x SM-RT800 brake rotors (140 or 160 mm)
– for internal junction box (SM-EW90-A): 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)*
– for internal junction box (EW-RS910), handlebar mount: 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) + 1 x EW-JC200 junction box (connection between EW-JC130 and EW-SD50 to SM-JC41 junction box)**
– for internal junction box (EW-RS910), frame mount: 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) + 1 x EW-JC200 junction box (connection between EW-JC130 and EW-SD50 to EW-RS910)***
– rubber grommets for internal cable routing
– wireless unit (optional): the wireless unit EW-WU101 allows you to display gear choice, battery status etc. on compatible bicycle computers or information displays. (When using a wireless unit, the EW-JC200 internal junction box is not needed).
* For the correct cable length ,the following frame measurements are needed:
– 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 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 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 bar end and STI on the side without EW-RS910 (3. = distance between stem and wireless unit / EW-JC200 is determined, 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 or EW-JC200 and EW-RS910
For Y-cable: 1. distance between stem and bar end left, 2. distance between stem and bar end and STI on the side without EW-RS910 (3. = distance between stem and wireless unit / EW-JC200 is determined, compare this to the cable length of EW-JC130 Y-cable junction box)