Re: DeRosa Merak Rear Brake Problem

On 1/1/2025 2:46 PM, cyclintom wrote:

I discovered why I got the Merak for nearly nothing.
 When it came time to install the rear brake I found a bolt somehow installed in the rear B-stay brake hole that has a 5 mm threaded hole in it. It is aluminum so the forward end of the device (between the B-stay and seat tube) which appears to be a normal brake lock, is stripped.
 Since the B-stay is carbon fiber I don't think that it is screwed in. I would think that it is a slight interference fit which would explain the stripped allen end. I suppose I could thread in the 5 mm allen bolt and using a puller, push the fitting out. Hopefully that would leave the original brake hole in original condition.
 I have never seen a rear brake attachment of this sort so I am asking if anyone has ever seen anything like this and if they have any comments on it and if they could suggest a removal technique that would leave the hole in original condition?

There is something inside your rear brake mount?
And that is a bolt? Or a sleeve with a 5mm threaded bore?
What is a B stay?
What is a normal brake lock?
Could it be a stuck/corroded brake mounting nut? That would be M6 not M5.  An aluminum nut may well be corroded in place. Clean as well as possible, examine in a good light with a magnifier if needed to see what it is an dhow it's held in place.
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Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971