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Peugeot UO-8 Fork Replacement

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Peugeot UO-8 Fork Replacement

Old 03-23-18, 11:13 PM
  #1  
kvwall23
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Peugeot UO-8 Fork Replacement

After a minor crash I noticed the front wheel of was out of line with the fork on my '78 Peugeot UO-8. The mechanic at my LBS said it was beyond repair and it would require a new fork and headset. I know that French bikes have their issues and from what I've read throughout these forums an ISO fork shouldn't have any issues. I already have a 22.2 stem sanded down to fit so I wont have to replace the handlebars.

What are some new forks that will work with this bike? I am currently running 700c wheels and am thinking that a 700c fork would actually be an improvement over the old 27". Would it be ok to buy a brand new fork or is it best to find an old french fork? I found a Peugeot Mixte framset from the early 80's for $40 and am considering purchasing the frameset for the fork alone. Will this fit an older UO-8 or would it be better to purchase a new chrome fork and headset?
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Old 03-23-18, 11:24 PM
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I'm guessing that fork will work fine IF it is long enough. The key dimension will be the length of your headtube vs that of the mixte. (Really easy to measure. Just the distance from the top of the bottom headset race to the bottom of the top race.) If the mixte headtube is too long, you can cut the fork steerer down and (if needed) have a shop thread the steerer further, but the shop will need a die to the French standard.

I'm guessing you could buy a far more common English standard fork and mix and match Tange headsets to come up with a combination that works, but I have not tried it. (I've mix and matched Tange headsets, both frame standards and Tange models to get them to work for other applications.)

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Old 03-24-18, 07:08 AM
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Your sanded-down stem won't fit correctly if you don't use a French fork.
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Old 03-24-18, 11:41 AM
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Originally Posted by 79pmooney View Post
I'm guessing that fork will work fine IF it is long enough. The key dimension will be the length of your headtube vs that of the mixte. (Really easy to measure. Just the distance from the top of the bottom headset race to the bottom of the top race.) If the mixte headtube is too long, you can cut the fork steerer down and (if needed) have a shop thread the steerer further, but the shop will need a die to the French standard.

I'm guessing you could buy a far more common English standard fork and mix and match Tange headsets to come up with a combination that works, but I have not tried it. (I've mix and matched Tange headsets, both frame standards and Tange models to get them to work for other applications.)

Ben
What do you mean by mixing and matching Tange headsets? I was assuming that I would only need a headset to match whatever fork I end up with.

Im looking into this fork: https://www.amazon.com/dp/B0781GDG33..._t3_B000AO9NTK

And this headset: https://www.amazon.com/gp/product/B0...8ELY2BCA&psc=1

I'd like to retain the vintage look and I like that that fork has eyelets for both fenders and a front rack (the Mixte fork does not). I will definitely have to cut and rethread, but I can do that at my LBS.
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Old 03-24-18, 12:11 PM
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How bad is the original fork? Lots of folks here would recommend straightening it. (Disclaimer: I have never tried. I have watched bike builders "cold forge" forks into straightness however.)
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Old 03-24-18, 12:55 PM
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Do I remember that the UO-8 had a fork with more rake than was normal? I was under the impression that a modern fork in a UO-8 would change the handling noticeably.
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Old 03-24-18, 01:34 PM
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Old 03-24-18, 01:53 PM
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Originally Posted by roadwing View Post
Do I remember that the UO-8 had a fork with more rake than was normal? I was under the impression that a modern fork in a UO-8 would change the handling noticeably.
I agree. Try to find another old French fork with similar curvature.
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