Shimano Di2 Wireless Shifting
The Shimano Ultegra R8170 Di2 Brake Set uses wireless controls at the handlebars, removing the need to route shift wires from the levers through the frame. Shift commands are transmitted to the compatible Di2 rear derailleur, which acts as the system’s wireless receiver and central control point.
The result is a cleaner handlebar area and a simpler installation on compatible road frames. Riders still receive the light, consistent button action associated with Shimano Di2, with no mechanical gear cables to stretch, corrode or gradually lose adjustment.
Shimano E-Tube Project allows riders and mechanics to configure shift-button functions, install firmware updates and personalise the electronic shifting system. Full and semi-synchronised shifting modes can also be configured according to rider preference.
SERVO WAVE Braking
SERVO WAVE changes the relationship between brake-lever movement and pad travel. The pads move rapidly towards the rotor during the first part of the lever stroke, providing a quick initial braking point. Once the pads contact the rotor, the system provides a broader control range for progressive braking modulation.
This makes it easier to apply small braking corrections on fast descents, control speed before corners and produce strong stopping power without an unnecessarily abrupt lever feel.
Ergonomic Lever Design
The Shimano Ultegra ST-R8170 hoods have a raised front section designed to provide a secure hand position during climbing, rough-road riding and sustained braking from the hoods. The lever body is shaped to distribute hand pressure and create a stable grip for long road rides.
Reach adjustment allows the lever blade to be positioned closer to or farther from the handlebar. Free-stroke adjustment further refines the amount of lever movement before the pads begin applying meaningful braking force.
Wider Brake Pad Clearance
The Shimano Ultegra BR-R8170 calipers provide ten per cent more pad-to-rotor clearance than the previous Ultegra generation. This additional space reduces the likelihood of light rotor contact after hard braking, out-of-saddle climbing or minor wheel movement.
The wider clearance also makes caliper alignment less sensitive to tiny setup variations, helping produce quieter operation on real-world roads.
ICE TECHNOLOGIES Compatibility
The calipers accept Shimano brake pads with optional cooling fins. These fins help transfer heat away from the braking surface, improving consistency during repeated braking and long descents.
For a complete heat-management system, the brakes can be paired with Shimano RT-CL800 or RT-MT800 rotors. These rotors use a layered construction designed to dissipate heat more effectively than a basic stainless steel rotor.
ONE WAY BLEEDING
Shimano’s ONE WAY BLEEDING system uses an internal oil-flow path designed to discourage air from becoming trapped in the hydraulic circuit. This helps qualified mechanics achieve a firm lever feel with a cleaner and more efficient bleeding procedure.
