Deep drop brakes

urbanfatboy
urbanfatboy Posts: 193
edited June 2007 in Road general
I'm after a set of deep drop brakes, to allow me to put 700c wheels on a bike made for 28" wheels

Are these the only ones that will do it or will something like these do the job?

Comments

  • Unknown
    Unknown
    By 28" (actually commonly applied to 700s!) do you mean 27"?

    If so, brake length needed when fitting smaller 700s will depend on the frame/fork clearances. For a bike built for close clearances with 27s, then the shorter of the two you link probably O.K. For a relaxed touring frame for 27s you will probably need the longer of the two. The 70s Falcon I've just recommisioned needs very long drop even with 27s in.

    d.j.
    "Like a true nature's child,
    We were born,
    Born to drink mild"
  • urbanfatboy
    urbanfatboy Posts: 193
    yes, sorry 27" it is the Viscount aerospace frame Graham G gave away.
  • urbanfatboy
    urbanfatboy Posts: 193
    but if 700c are 28" surely the drop would need to be shorter, if the bike was designed for 27" ?? I think I'm getting confused.
  • Unknown
    Unknown
    Trust me!

    700, 27, 28 and 26 (which is actually used for at least two quite different rim sizes!) are pretty arbitrary nomenclatures. Standard sizes are formally/technically specified by ERTO (or ETRO, I can never remember which!) according to rim diameter and width. Thus a 700 is 622 and a 27" is 630. The former is thus 4mm less in radius!

    d.j.
    "Like a true nature's child,
    We were born,
    Born to drink mild"
  • urbanfatboy
    urbanfatboy Posts: 193
    I do trust you. I ordered the Alonghas just to be safe, though the others are prettier.

    Cheers
  • graham_g
    graham_g Posts: 652
    Good move on the Alonghas - I've got a rear Tektro caliper in the parts bin because it just wasn't quite far enough (although I could just file the slots).
  • urbanfatboy
    urbanfatboy Posts: 193
    whew!

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