Shimano Ultegra ST-R8170 Hydraulic Di2 Lever and Caliper

Features

• High-performance Ultegra Wireless hydraulic Servo Wave disc brake Di2 STIs give control, modulation and power with minimal effort in all riding conditions
• Operates rear derailleur and front brake
• Wireless connectivity to the front and rear derailleurs for effortless trouble-free gear shifts
• With Di2 technology shifting is easy and precise – just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear
• Full and semi synchronised shifting programable
• Synchro shift compatible meaning a single shifter can control both front and rear shifting which can be fully custom tuned to your riding preferences
• Semi synchronised shifting means when a front shift is made the rear mech will automatically correct to the appropriate ratio
• Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold
• Drop bar STI with shift buttons located in a near identical place to the positions you’d assume shifting using a mechanical Shimano STI
• Hydraulic brake lever with Servo Wave provides excellent stopping power with less effort especially from the hood position
• Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear
• Finely tuneable reach adjusters for the levers enable custom fitment for all hands
• Levers use CR1632 batteries which last for approximately 1.5-2 years
• Front wheel use for flat mount forks
• Oversized 22mm ceramic pistons optimised for heat insulation, lightweight and stiffness
• Opposed 2-piston design reduces leading effect and optimal pad wear increases braking control
• Increased pad to rotor clearance reduces the chance of rotor drag
• Direct flat mount and open design allows easy and quick wheel replacement
• Forged calliper design is lightweight and rigid
• One-way internal fluid circuit makes bleeding easy
• Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid
• Shim-less mounting bracket allows for quick installation and setting up
• Recommended for use with Ice Tech FREEZA Center Lock SM-MT800 rotors for optimum braking performance
• Comes complete with resin compound aluminium radiation fin pad further improves heat dissipation reducing brake surface temperature by 50°C
• Inline hose routing for low profile design
• Separate bleed port and valve screw for improved bleeding process
• Kit contains bled ST-R8170 STI, BR-R8170 flat mount brake callipers with pads, hoses and mineral oil (without rotors or adapters)