Hydraulic Disc Brakes for Road (Update!)

Thanks to Hand of Midas for the working link to a pic.

Interesting shape to the grip…looks pretty long.  I’ll be curious to see whether the master cylinder is fixed into place (and actuated by a moving brake lever) or is floating.  I’ll also be curious to see how the linkage between the brake lever and master cylinder works.  Combining road tires and their compact contact patch with hydraulic disc brakes may create a good reason to have a design where the angle between the master cylinder and brake lever changes as the brakes go through their actuation.

I’m not certain what metric bike designers use for this issue, but let’s talk about braking force generated per millimeter of lever travel.  It might make sense to have road bike brake levers where the force generated decreases slightly as the lever moves through its travel.  You wouldn’t want it to decrease so much as to feel spongy, or to sap your confidence in the brakes…but if there was a small, linear change in the force generated, it might give better brake modulation, to manage the increase that’s coming in overall stopping power generated.

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5 thoughts on “Hydraulic Disc Brakes for Road (Update!)

  1. Assumption is a version of taperbore™ is going to be incorporated, which imo is an adequate way to get modulation. Even though the contact patch is significantly smaller, the traction is *normally* greater due to the surfaces. When was the last time you spun a tire from leg force on your Road bike vs MTB? (Bushido doesn’t count;)

    • Happens to me all the time. Just too much power, I guess.

      As for taperbore, it doesn’t allow for variable force/travel rate. The actual bore of the master cylinder, during the part of the stroke where it is in travel and causing brake application, doesn’t change (notwithstanding the name).

      • Well, either way, there is probably going to be a version of taperbore in the Red levers. I don’t see them using an eccentric mounted wheel to activate the plunger like shimano does to control their pad contact, pretty sure that technology (circle with offset hole technology) is ©.
        With the grip that a road tire has on blacktop,and with using 140mm rotors, i don’t see any problems though, i think it will be intuitive. My Elixers have always had great modulation.

        However, Sram should use a system without a fluid reservoir, like this german company. Then they could make the lever body not really fugly.

        http://www.brakeforceone.de/

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