Garth Libre wrote:
One of my bikes has the modern brakes that are now called dual pivot because the right arm pivots on the center bolt and the left pivots on its own side bolt. Well this is a good modern idea, but it seems still quite a bit less simple and elegant than the old center pull system which gives you two side pivots and a symmetrical arrangement to boot. The question is, did any manufacturer ever come up with a centerpull arrangement that had integral in the design its own pulling point, so that nothing needed to be attached to the headset nor the rear seatpost bolt? A quick search of my memory nor books I have turned up anything. Such a device could extend up from the center bolt the same one or two inches the common centerpull arrangement now has.
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Here are two classes of examples:
1) The Altenberger/GB "Synchron" of the 1960s was a dual pivot side-pull, and clearly the antecedent of the modern dual pivot designs.
2) In the 70s (?) there were several brands of "Delta" brakes which would seem to qualify. I have Shimano Dura-Ace, Campy, Weinmann, one unlabeled, and Huffy versions.
harvey sachs
mcLean va