I thought I'd ask them, and here is the (extremely prompt) reply:
Anthony
You should have nothing to worry about. It was not a question of engineering but that of some faulty material. That’s why only a specific batch was effected. And of the few we did see have an issue, it all happened right away. So if you and your friend have been riding it for 10 years, I would say you are ok. Please let us know if we can be of any more help.
Thanks for checking with us.
Eric Fredrickson
Warranty & Customer Service
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Subject: Older CroMoto stem
Hi
I have a CroMoto quill stem with removable face plate that I bought maybe around 2000. The last time I saw it, there was nothing visibly wrong with it, but the bike is on long-term loan to a friend and I don't want to take any risk of exposing him to danger.
I know my stem is outside the product recall dates, but can you tell me please whether there is any difference between the design or manufacture of my earlier stem and the ones that have given trouble? Also can you tell me where the faults have occurred, so that I can inspect it more carefully there?
Many thanks