early Campagnolo sidepull calipers
06-14-06, 02:08 PM
#1
feros ferio
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early Campagnolo sidepull calipers
OK, engineering quiz for the day:
Why do even short-reach early Campagnolo sidepull brake calipers provide such poor braking performance? I have ca. 1980 Galli sidepulls which perform MUCH better than the Campagnolos, and mid-to-long reach (610 front, 750 rear) Weinmann Vainqueur 999 centerpulls which rank between the Gallis and the Campagnolos.
Why do even short-reach early Campagnolo sidepull brake calipers provide such poor braking performance? I have ca. 1980 Galli sidepulls which perform MUCH better than the Campagnolos, and mid-to-long reach (610 front, 750 rear) Weinmann Vainqueur 999 centerpulls which rank between the Gallis and the Campagnolos.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
06-14-06, 04:02 PM
#2
Dharma Dog
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Centerpulls will provide more leverage than single-pivot sidepulls. Think of the caliper as a lever with the pivot as the fulcrum, and you'll immediately see why they should theoretically provide more braking power for a given input. The knock against the centerpulls is the sponginess coming from the cable anchor (and the flex in the calipers in the case of the long Weinmanns). The best compromise seems to be the dual pivot sidepulls we use today, which are a combination of centerpull on one side and single-pivot sidepull on the other (and cable anchor directly attached to the caliper). As for why the Galli sidepulls perform much "better," I don't know. I'd have to see and try them. Presumably they would be less spongy than the Weinmanns, but theroretically they should be equivalent to Campag. Maybe the pad composition? Does Galli still stop better when pads are switched? Are the same levers being used?
- L.
- L.
06-15-06, 04:28 AM
#3
Senior Member
Originally Posted by John E
OK, engineering quiz for the day:
Why do even short-reach early Campagnolo sidepull brake calipers provide such poor braking performance? I have ca. 1980 Galli sidepulls which perform MUCH better than the Campagnolos, and mid-to-long reach (610 front, 750 rear) Weinmann Vainqueur 999 centerpulls which rank between the Gallis and the Campagnolos.
Why do even short-reach early Campagnolo sidepull brake calipers provide such poor braking performance? I have ca. 1980 Galli sidepulls which perform MUCH better than the Campagnolos, and mid-to-long reach (610 front, 750 rear) Weinmann Vainqueur 999 centerpulls which rank between the Gallis and the Campagnolos.
Tim
06-15-06, 06:30 AM
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Campy used to claim that their brakes were made to control your speed, not stop you. Their current brakes are a lot better.
Yes, even the worst single pivot brakes will lock the wheels if applied with enough force but the benefit of dual pivots is the reduced force needed to brake over a long period. When you come down a five mile long twisty decent, the benefits of dual pivots are immediately apparent.
Yes, even the worst single pivot brakes will lock the wheels if applied with enough force but the benefit of dual pivots is the reduced force needed to brake over a long period. When you come down a five mile long twisty decent, the benefits of dual pivots are immediately apparent.
