Shimano enters into road hydraulic disc brakes with their BR-R785 brake caliper. It combats the extreme heat that road cycling creates for brake systems by using their ICE Technologies radiator-fin pads, and oversized 22 mm ceramic pistons that prevents the heat caused under braking from spreading through the the caliper and disrupting the system.
These calipers are compatible with hydraulic Di2 levers and are designed for 140 or 160 mm rotors.
Claimed weight: 262 g. Price is per caliper.
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Big step forward, go for it.
First of all, I hate brake fluid. I have spent hours and hours bleeding auto systems. I'm not looking forward to dealing with these when the time comes. HOWEVER these simply work so much better than rim breaks there is no real conversation to be had about disc vs. rim brakes. Rim brakes are on the way out. Your next bike will have discs. These came stock on my 2016 Tarmac (140mm, 16.7 pound 56cm with flat kit). Remember what it was like when you got a mountain bike with disc brakes? Superior stopping, true one finger control. Brakes are the only real safety feature you have on your bike, why would you not want the best - because it is forbidden for the pros? I think that has more to do with Campy's lack of a road disc system at this time. Stopping from 35 or 40 mph abruptly is no longer a spine chilling event. Honestly, you start watching races differently as in, 'if they had better brakes that would not have happened'. You will find yourself braking and drinking at the same time. You would never do that with rim stops. My previous groupo was DuraAce.
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