Shimano 105 R7170 Disc DI2 groupset

This groupset features Synchro Shift technology, where the front and rear derailleurs communicate with each other as you shift through the gears. This ensures that at any point, your drivetrain is sitting in the optimal gear ratio to provide the highest efficiency and performance while also delivering the lowest wear on your drivetrain.

Brake/Shift System: R8070 Ultegra hydraulic Di2 STI Drop Bar E-tube and Hydraulic Calipers
Drop bar Di2 STI lever with shift buttons
Hydraulic brake lever with an integrated Hydraulic reservoir tank
Finely tuneable Reach and Free-Stroke adjustment
Two ports for use with E-tube electric cables
Kit contains two bled ST-R8070 STI levers, BR-R8070 flat mount brake callipers with pads, hoses and mineral oil and 160-mm discs (adaptor included!)

Front Derailleur: R8050 Ultegra Di2 11 Speed Front Derailleur E-tube
Designed to work with the wider gear pitch spacing Shimano chainsets without sacrificing shifting performance on bikes with 135 / 142 mm O.L.D.
Precise and accurate shifting
Low-profile design
11-speed E-tube Di2 compatible
Weight: 132g

Rear Derailleur: R8050 Ultegra Di2 11 Speed Rear Derailleur E-tube
High tolerance cold forged aluminium link plates and body construction
Four self-lubricating micro-machined fluorine-coated link pivot bushings
11-Speed E-tube Di2 compatible
Contains a saver (fuse) function
Weight: 242g

Chainset: R8000 Ultegra 2x11 Speed
New 4-arm design for stiff, lightweight performance
Hollowtech II construction
Hollowglide chainrings
11-Speed Compatible
Bolt Circle Diameter (B.C.D): 110mm
Compatibility: Frames with O.L.D. 135 / 142 mm and 410mm chainstay length
Weight: 690g

Cassette: R8000 Ultegra Ultegra 11 Speed
For use with 11-Speed HG-EV chains
Advanced, optimised shifting performance

Chain: Ultegra HG701 6800 11 Speed
Sil-Tec surface treatment technology (PTFE plating)
Zinc-Alloy plated outer links
5.62mm chain width

Cables: Shimano Di2 E-tube Electric Wires
300mm x 1
350mm x 2
600mm x 1
700mm x 1
1000mm x 1

Electronics: 
SM-EW90-A E-tube Di2 Junction Box-A, 3 port and the M-JC41 E-tube, Di2 bottom bracket Junction for internal wire routing
Di2 internal mount battery
Di2 internal battery charger direct to SM-EW90 Junction (one hour charge time)