Originally Posted by ratfink76

I'm using a 1" threadless carbon fork on what I think is a 1980 PFN10E with Vitus 172 tubing. My research showed that in the early 80's Peugeot was moving from French threading to English to standardize. My frame had the French headset, but the BB and the RD Hanger were English threaded.

The headset on it was junk so instead of trying to source a new one, I took the opportunity to run a Kinesis Carbon fork I've had laying around for some time and so I boxed the original fork, headset, stem and bars up for another day...