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Shimano
ST-R785 Di2 Hydraulic STI Lever & Disc Brake Caliper Set

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Stop on a dime.

Shimano debuts its hydraulic disc brakes as an Ultegra-level component in the form of the R-785 Di2 Hydraulic STI Lever and Disc Brake Caliper Set. This is a bit of a flip-flop for Shimano, but presumably it's because the UCI has not yet approved disc brakes at the pro-level for which its flagship Dura-Ace groupset is intended. So rather than the traditional trickle-down effect that Ultegra is normally imbued with, in this case it is at the top from the start.


The Road disc brake system was designed to be compatible only with Di2 electronic shifting. To this end, the front profile is higher than the Ultegra profile in order to hold the fluid reservoir for mineral oil. They feature reach and stroke adjustments so that your hand position is optimized. Most importantly, braking power is consistent no matter what the conditions. The brake calipers features Shimano's IceTech technology. This technology dissipates heat more effectively so that the brakes grab faster and the pads last longer. This is done by cooling fins in the braking pads.


The Shimano ST-R785 Di2 Hydraulic STI Lever and Disc Brake Caliper Set does not include the rotors.


Details

  • Ultegra-level hydraulic disc brake and Di2 shift levers
  • Japanese precision updates hydraulic braking
  • Race-worthy shift action from the most popular group we sell
  • Levers provide reach and stroke adjustment to dial feel
  • Heat-dissipating features keep the braking responsive
  • Item #SHI001Z
Lever
ST-R785 Di2 hydraulic STI
Actuation
hydraulic
Caliper
BR-R785 hydraulic disc brake
Mount Type
post
Fluid
mineral oil
Claimed Weight
[levers] 498g, [caliper] 262g
Recommended Use
cyclocross, gravel, road cycling
Manufacturer Warranty
2 years

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