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When did Peugeot start using English threading?

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When did Peugeot start using English threading?

Old 05-23-20, 04:57 PM
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oneclick
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When did Peugeot start using English threading?

I thought they didn't use english threads until the lugless brazed frames.

But I've just started working on a 1985? (7 digit serial on the seat tube, first one is a 5) UO12* (the * is part of the model name decal on the chainstay) and it has lugs (nice ones) and english threads.
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Old 05-23-20, 05:41 PM
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there have also been periods when they employed Swiss thread on some models

IIRC there were some Peugeot badged cycles of the 1940's and 1950's which came through with Swiss thread

then they returned to it for some models beginning in the late 1970's

do any of our leone rampante experts know the dates for this?

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when French manufacturers transitioned to ISO standard they seemed to do so in stages, changing some things but not others

would think that frame tubing diameters would have been the last thing changed

what say the experts?

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Old 05-24-20, 08:41 AM
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Think price or source.

when the price was higher for metric - change
source- Motobecane used Columbus for some models- they did not make metric
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Old 05-24-20, 09:40 AM
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Originally Posted by repechage View Post
Think price or source.

when the price was higher for metric - change
source- Motobecane used Columbus for some models- they did not make metric
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Cycles Stella of Nantes was offering all metric road machines of A.L. Colombo eleven-tube tubesets at least as far back as 1973.

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Old 05-24-20, 09:52 AM
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The switchover was generally in the early 80s. It's not surprising that your '85 has English threads. There was a crossover period where it could go either way, IIRC. With Peugeot, their specs were always somewhat inconsistent anyway. There must be someone here that worked at a Peugeot shop during that period that could give you more precise information. I generally assume that if the crankset on a Frenchie bike is a Stronglight 105 BIS or earlier (93/49 etc), it's probably French threaded. After that, probably English. There's exceptions.
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Old 05-24-20, 10:25 AM
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My '78 PX10 had an English threaded BB for its Stronglight 99 crank.
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Old 05-24-20, 10:30 AM
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Originally Posted by thumpism View Post
My '78 PX10 had an English threaded BB for its Stronglight 99 crank.
Was if factory? That seems a bit early to me but possible.

OTOH, because you can cram an English threaded BB into Swiss threads, hack mechanics often did.
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Old 05-24-20, 10:33 AM
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Originally Posted by Salamandrine View Post
Was if factory? That seems a bit early to me but possible.

OTOH, because you can cram an English threaded BB into Swiss threads, hack mechanics often did.
I removed the plastic-wrapped bike from the box and cut away the plastic in order to assemble it, so I would guess yes.

On the other hand, no telling what they might have done to it at the factory.
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Old 05-24-20, 02:11 PM
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1984 was the last year here in the US when Peugeot sold bikes with french and swiss threading......
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Old 05-24-20, 05:40 PM
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Originally Posted by thumpism View Post
I removed the plastic-wrapped bike from the box and cut away the plastic in order to assemble it, so I would guess yes.
I would consider that to be a pretty good indicator.

Maybe they ran out of Swiss and French bottom brackets and/or bottom bracket shells that week. Wouldn't surprise me. It does make it easier for the here and now.
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Old 05-25-20, 07:18 PM
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My 1980 PKN-10, which is now my elder son's, definitely has a Swiss-threaded BB, as I discovered when I converted the crankset to a Sugino triple. (He told me he is thankful for that 34T inner ring when pulling both boys uphill in the trailer.)
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Old 05-26-20, 03:58 AM
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Originally Posted by Salamandrine View Post
I would consider that to be a pretty good indicator.

Maybe they ran out of Swiss and French bottom brackets and/or bottom bracket shells that week. Wouldn't surprise me. It does make it easier for the here and now.
Just pulled the fork and the crank and BB from another 1985 (by serial) Peugeot; no lugs, french steerer, english BB.

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Old 05-26-20, 06:44 AM
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My 1980 pkn10 has a French bb. My 83 ph11 has English threads.
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Old 05-26-20, 01:43 PM
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Originally Posted by juvela View Post
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Cycles Stella of Nantes was offering all metric road machines of A.L. Colombo eleven-tube tubesets at least as far back as 1973.

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French threading was on the way out. As the larger demand was for ISO threading, why spend more just to be different?
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