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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 12-20-08, 12:03 PM   #1
CO_Steve
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Goofed up

The other day I bought a rebuilt RS Duke fork of Craigs for cheap to use on a beater mtb I'm building. When I was installing it it didn't have brake studs installed. Found a set in the junk box. First one goes in fine, second balks with about one turn to go. Lean on it just a bit and the entire boss breaks off. Turns out the hole wasn't drilled quite deep enough and it bottomed out. Previous owner used disks. Now I figure I've got to turn this bike into a mullet. More $ into what was supposed to be a cheap bike. The broken section looks ugly so I grab the JB Weld and glue it back on. No way I'm riding this, right? I know JB is strong but all I can imagine is it letting go, brake arm swinging into front wheel, going down hard.
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Old 12-20-08, 12:10 PM   #2
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How about Real Weld ?
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Old 12-20-08, 12:59 PM   #3
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Is that a product or are you talking about actually welding? I didn't think castings like this welded very well.
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Old 12-20-08, 01:10 PM   #4
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JB Weld is glue. I wouldn't trust it myself.

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Old 12-21-08, 09:27 PM   #5
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Drill bit and an easy out.
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Old 12-22-08, 03:21 AM   #6
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It wasn't the brake stud that broke. About 3/4" of the threaded part of the casting separated from the main body.
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Old 12-22-08, 12:20 PM   #7
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Run cheap disk brakes?
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Old 12-24-08, 03:45 PM   #8
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Have you considered swearing?
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Old 12-25-08, 08:52 AM   #9
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Either completely disassemble it and have it welded or use disc brakes. Jb weld and other epoxies are not suitable for this You might be able to figure out a mechanical clamping arrangement with something that goes all the way around the shock tube, but it still would be marginal.
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