OK, gang, here's the story:
The adjuster o-rings for Campagnolo brakes appear to be size AS568A-204, which is 0.359" inside diameter and 0.139" thick. I just ordered 1000 of these, in nitrile (AKA buna-n), min order, from an on-line supplier for $20, including shipping. So, that's $0.02 each, a tad cheaper than the ~$3 each from bike-supply places.
I'll let you know if they're right. If they are, I'll happily share them with anyone who needs them.
Steve Maas Long Beach, California.
> Hi,
> I was wondering if there was a source for the rubber "O" rings on the
> brake calipers?? I could use 2 sets (4 of them), do I go to the hardware
> store????? Thanks, John Morrison, Dana Pt. SoCal