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  1. #1
    you guys ridin'? MTBaddict's Avatar
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    Shimano BR-R550 Cantilever Brakes

    Do Shimano BR-R550 brakes rotate on the canti post or do they have an internal bearing/bushing on which they rotate (like Paul's Touring Canti, Shimano XT V-brakes, etc.). I am concerned about long-term wear on my canti posts because they are not removable (welded).
    Santa Cruz Heckler, Gary Fisher Hoo Koo E Koo, Schwinn Le Tour III, Giant Perigee, Motobecane Le Champion Ti SL, Jamis Nova, Salsa Vaya

  2. #2
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    Quote Originally Posted by MTBaddict View Post
    Do Shimano BR-R550 brakes rotate on the canti post or do they have an internal bearing/bushing on which they rotate?
    There are those who claim having seen cantis that rub against the post, but I've never come across one. Not that I'm a professional mechanic, but I do spread my tinkering far and wide...

  3. #3
    you guys ridin'? MTBaddict's Avatar
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    Most cantilever brakes that I have seen are made with a brass bushing that rubs against the steel canti boss. Normally, they do not have seals to keep the grease in and the contaminants out. Even some expensive canti brakes for cyclo cross go this route to keep the weight to the minimum. I wouldn't run them on a touring rig.
    Santa Cruz Heckler, Gary Fisher Hoo Koo E Koo, Schwinn Le Tour III, Giant Perigee, Motobecane Le Champion Ti SL, Jamis Nova, Salsa Vaya

  4. #4
    just pokin' along desertdork's Avatar
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    After checking a new, unmounted BR550:

    The canti arm rotates on a bushing; it does not pivot on the
    post itself. The spring anchor stud is integrated with the
    bushing. Once this stud is inserted in the hole adjacent to
    the canti boss, the bushing is essentially fixed in place and
    will not rotate against the canti post. It would seem that
    greasing the post serves to guard against rust/corrosion, not
    for protecting against abrasive wear. "Seals" wouldn't do much.

  5. #5
    you guys ridin'? MTBaddict's Avatar
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    That's exactly the information I needed. I suspected such was the case by checking photos of the BR-R550, but I needed more certainty before putting my money down. Thanks!
    Santa Cruz Heckler, Gary Fisher Hoo Koo E Koo, Schwinn Le Tour III, Giant Perigee, Motobecane Le Champion Ti SL, Jamis Nova, Salsa Vaya

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