Vintage dia compe gran compe parts
07-28-20, 09:07 PM
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Vintage dia compe gran compe parts
so I'm missing the quick release set up on one of my brakes. I believe it is a dia compe gran compe base on the rear release. I've looked online for parts source but can't say I've found anything. One place had possible correct part but wanted a crazy amount for it. Anyone know of a source for parts like this they are willing to share? My LBS is pretty much useless and no coop within 2 hour drive to go snoop at.
07-29-20, 08:09 AM
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You may be better off buying a whole caliper, the part you are seeking is the weak link of the model. I don't know if the updated versions part can drop in.
07-29-20, 02:20 PM
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Every once in a while a set of adjusters show up on eBay.
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07-29-20, 02:43 PM
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07-29-20, 03:44 PM
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merrman-
You might want to consider Weinmann 405 QRs, they look about the same and often Weinmann/Dia Compe/Gran Compe parts interchanged. https://i.ebayimg.com/images/g/Ke8AA...YU/s-l1600.jpg
You might want to consider Weinmann 405 QRs, they look about the same and often Weinmann/Dia Compe/Gran Compe parts interchanged. https://i.ebayimg.com/images/g/Ke8AA...YU/s-l1600.jpg
Last edited by bertinjim; 07-29-20 at 03:46 PM. Reason: spelling
07-29-20, 04:34 PM
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Couple of things come to mind, maybe more theoretical as I never experienced them, but....
First of all, the old "Shoot, I stripped the cable anchor threads!" Don't know that's a bigger problem with these particular calipers than others, but stripping those threads in general is not uncommon.
Then the QR design isn't optimal, in that it's relatively difficult to open the QR under full cable tension. Better to squeeze the shoes against the rim, lessen the cable tension, then open the QR lever. I reckon if you're sloppy with the QR, the pivots could get sloppy, or maybe you could wear down the small nub on the cam-like section that holds the QR closed, in which case the QR would pop open under regular braking force.
Or something else I'm not thinking of, or aware of? All steel, so it rusts easier and the pivots freeze?
I used these a bit back in the day, and the cheaper DC500 calipers, I think, that had the same/similar QR design. A little hinky, but I never had any trouble with them. Definitely upgraded to Superbe Pro as soon as I saved enough $$$.
First of all, the old "Shoot, I stripped the cable anchor threads!" Don't know that's a bigger problem with these particular calipers than others, but stripping those threads in general is not uncommon.
Then the QR design isn't optimal, in that it's relatively difficult to open the QR under full cable tension. Better to squeeze the shoes against the rim, lessen the cable tension, then open the QR lever. I reckon if you're sloppy with the QR, the pivots could get sloppy, or maybe you could wear down the small nub on the cam-like section that holds the QR closed, in which case the QR would pop open under regular braking force.
Or something else I'm not thinking of, or aware of? All steel, so it rusts easier and the pivots freeze?
I used these a bit back in the day, and the cheaper DC500 calipers, I think, that had the same/similar QR design. A little hinky, but I never had any trouble with them. Definitely upgraded to Superbe Pro as soon as I saved enough $$$.
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07-29-20, 09:31 PM
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Thanks for the replies. I'll expand my search a little to include the weinman parts as well. Just trying to avoid spending much in this covid year so trying to avoid replacement calipers for now.
07-30-20, 09:15 AM
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In my opinion, the cable clamp design is flawed. The through cable clamp spot has the Allen bolt in to chinch the cable will break if tightened to many times or to much.
Getting them set is a fine line of to loose it will slip, and just when you think you have it at the right tork it slips, give it another little turn the bolt, oh snap.
The next version of the caliper has a clamp more like the traditional Campy brake.
Getting them set is a fine line of to loose it will slip, and just when you think you have it at the right tork it slips, give it another little turn the bolt, oh snap.
The next version of the caliper has a clamp more like the traditional Campy brake.
07-30-20, 11:57 AM
#9
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Can't one simply replace the clamp screw? With, say, a stainless steel (harder) cap screw? -- not that it will help the OP, who's missing all the parts of the QR.
