Bike Forums - View Single Post - Do 31.8 clamp bands for brake levers exist?
Old 03-05-18, 06:01 PM
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Originally Posted by CliffordK View Post
That second bar that you show looks like the "wings" may be removable, or a separate part from the main bars.

Nonetheless, you should be able to pry the clamps open... hopefully. If you found, or had some made that were the right size.

I haven't tried the Dia Compe 139 brakes. They'd have to be a pretty good match for your bars to be useful, although you should have some right/left adjustment and rotational adjustment during the install.
Yes, the OP can pry the clamps open but that won't solve the problem. They will only work on a bar that's roughly 23.8mm because the band isn't long enough to close and bring the holes into alignment on anything larger.

It's possible that some brand of interrupter lever has an optional 31.8 clamp, but I suspect that the OP's only option is going to be DIY.
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