I recently picked up a set of Avid DB1's and put them on my bike, but it was a bear to get them on. For background, they've got a split clamp that is similar to a seat tube where simple compression keeps it in place versus a two-piece clamp that requires more than one screw to tighten.

What I found was that the clamp, even when loosened all the way, would not slide down the handlebar and I had to shimmy it back and forth to move them further in, which ended up scratching and removing a large amount of paint (it's ok, that part goes under the grips). But this doesn't seem right to me. Is there:

  1. a better way to install them?
  2. different handlebar diameters that would complicate installation?
  3. something else I totally missed?
  • All handlebars are not he same diameter. The lever needs to match the handlebar diameter. But most mountain are the same size.
    – paparazzo
    Sep 25, 2014 at 14:57
  • Did you follow the installation instructions?
    – Batman
    Sep 25, 2014 at 15:16
  • @Batman, there weren't any supplied as it was a CL purchase. Also, none of those clamp styles match the brakes. I'll see if I can grab a photo later.
    – Aaron
    Sep 25, 2014 at 16:53
  • Those are the instructions Avid provides for the DB1 on their website, so I'm somewhat surprised if the instructions don't match.
    – Batman
    Sep 25, 2014 at 17:06
  • @Batman Perhaps because they were OEM take-offs?
    – Aaron
    Sep 25, 2014 at 17:26

1 Answer 1


A general procedure with too tight clamps: Put in the screw or a longer one of the same diameter from the opposite side. Fit a piece of (hard, like a small coin) metal into the slot. Tighten the screw carefully. It should open the clamp enough to fit it over the bar

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