On Apr 2, 2012, at 8:30 AM, shawn wrote:
> How many miles can one expect to get out of a typical headset and
> bottom bracket?


Well, This varies by headset.  The headset in my 1996 All-Rounder is the 
original Stronglight (A-6, I think).  I've repacked it two or three times in 
the past 16 years.  Many miles, not sure how many-  15,000-20,000 probably.  
I've heard of headsets that were ruined with 0 miles on them after being on the 
roof rack of a support car.  I've got a cartridge bearing "ThreadSet" in my 
Ritchey road bike that is also from ca. 1996- it was in the frame when I bought 
it used in 1999, and has never needed more than an occasional adjustment.

BBs, I've gotten years out of the Campy Veloce BBs and still smooth as silk.  
And I've gotten 15+ years out of good quality cup and cone BBs (SunTour 
Superbe, Ritchey Logic).  I used to rebuild those at least once a year and 
replaced the ball bearings as needed.

Tim

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