Shimano Ultegra Di2 R8170 12-Speed Front Hydraulic Disc Brake Kit 2x12-Speed

The Shimano Ultegra Di2 R8170 front hydraulic brake kit combines an electronic lever and a flat mount calliper. It is for riders using a road bike with a Di2 12-speed drivetrain, for racing and training.

• Lever and calliper in the same kit, pre-filled with mineral oil
• Ice-Tech brake pads with cooling fins to dissipate heat during braking
• Lever adjustable by 16.4 mm to suit your hand
• Flat mount calliper with adapter, for 140, 160 and 180 mm rotors
• Compatible with Di2 12-speed groupsets from the R8100, R9200 and R7100 series

Technical specifications

• Series: Ultegra R8100
• Use: Road
• Shifting: 2x, 12-speed, electronic, semi-wireless
• Brake type: Hydraulic, 2 pistons; fluid: mineral oil
• Brake hose: SM-BH90-JK-SSR; 1000 mm (front)
• BR-R8170 calliper: Flat mount; aluminium body; resin pistons; straight hose connection
• Compatible rotors: 140 mm, 160 mm, 180 mm
• Brake pads: Resin with cooling fins (Ice-Tech); narrow shape
• ST-R8170 lever: Aluminium lever; carbon body; 23.8-24.2 mm closed clamp; 16.4 mm reach adjustment; CR1632 battery
• Contents: 1 BR-R8170 + ST-R8170 brake; 1 1000 mm hose; 1 pair of brake pads; 1 front rotor adapter; fittings with olive and pin; 2 calliper bolts

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.