Originally Posted by Andrew R Stewart

Headsets were asked about and I really didn't answer completely. One issue I see every so often is with a threadless headset/fork/stem is that the spacers between the stem and the rest of the system can corrode really badly. To a point where they effectively lock the adjustment to where it was before the corrosion happened. Just about every bike I see (and have removed the stem on) has no lube or other compounds on the fork's steerer where the stem and spacers are located. Most of the time it's a non issue, casual use/dry conditions/no aggressive sweat or salt water. But it get's a pain to have to saw off these spacers (and be careful to not nick the steerer) when doing what should be a quick and easy overhaul. So I advise applying a thin coat of some lube/compound on the steerer. Andy