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Delta Brakes(6 posts)

Delta BrakesDjudd
Jul 20, 2001 3:53 PM
Does anyone know where I can get a set of the "old" Campy delta brakes. They would be perfect for a older project I'm working on. Plus they were great brakes
Pretty,but..Jofa
Jul 20, 2001 4:02 PM
... they were terribly designed, and never worked properly. Ebay usually produces a few sets for sale. I regrettably sold some of the Croc D'Aune ones for a pittance, about 8 years ago when desperate for cash. For ultra- nerd brownie points you could find a set of the Modolo originals from the 70's, I forget the model name however.
you tried the wrong Deltasclub
Jul 21, 2001 5:11 PM
the crouch-downs sucked. the records are great, they're all the brake I need in the San Juan mountains. in the future, please clarify that your opinion of Deltas pertains to the crounch-downs because the Records don't deserve you going around bad-mouthing them.
WoooOOooo...Jofa
Jul 22, 2001 7:31 AM
I've said before that I'm a fan of the Delta brake on purely aesthetic grounds, but in terms of performance, they were all bad, and it's the design that's at fault, not the manufactering quality or polish difference between component levels. This design error is well documented... here's Jobst Brandt on the subject (from the rec.bike.tech archives):


"...As I mentioned before, the Delta brake had a tangent function response because it has a weird parallelogram linkage that has a mechanical advantage that sweeps from zero to infinity. It embodies that which many non brake people imagine would make an ideal brake, one that brings the pads into contact at a low mechanical advantage and braking with a high one. The trouble is, no one can predict at what part of this variable ratio rim contact is made, especially in the rain when pad wear is great. The resulting response makes riders "gun shy" to
grabbing a handful of brake because it might cause an endo.

Variable ratio and self-servo brakes are a well understood disaster. That Campagnolo built this brake is such a huge technical blunder that it raises doubts about their management at the highest places. Anyone who has worked in automotive braking can attest to this assessment.
It was an expensive error and one that exposed the state of
engineering to Shimano who could easily take great solace in the ineptness of their competition."


For knocking about on the flat, Delta's are fine... and you seem happy with them in the mountains. I was never happy riding mountainous roads with them, as their performance was so affected by pad wear that you could start a day's riding with decent braking, and by the end, not be able to stop even with the lever to the handlebar. Brakes which worked properly were available then, and still are, so there's never been any reason for using Delta's, other than that they look nice.
I'm sure Jobsts has been wrong before,Anvil
Jul 22, 2001 12:51 PM
so this won't be the first time. If you read between the lines, what he's saying is that they require proper setup. For the record, I've done mountainous double centuries (Denver to Aspen Classic) in terrible weather and I've never had my road bike brake blocks wear enough to make a significant difference in braking. I'm sure he'd say the same about V-brakes on MTBs. Set them up properly and they'll perform as well as any brake out there.

Cheers!
e-mail meRon L.
Jul 21, 2001 4:25 PM
I have two sets