On Nov 23, 2009, at 10:47 AM, Jan Heine wrote:
> This is interesting... and leads to the question "why headset and not
> bottom brackets." Campagnolo bottom brackets often last 60,000+ miles
> with normal maintenance, even on bikes ridden year-round. Were the BB
> races hardened more carefully, perhaps by a different subcontractor?
> Does hardness not matter as much on a BB race with its high rpm, low
> point load?
You are correct that the load path and load cycle is completely
different. But use has something to do with it. I've used Campy
headsets for almost 40 years and the only ones I ever had trouble with
were those that I hadn't personally adjusted. I use a slightly
different method than most-hard to describe but easy to
demonstrate-that seems to yield longer service life.
Phil Brown
Oakland, Calif.