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Peugeot Super Competition with a French steerer tube and an English BB**********

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Peugeot Super Competition with a French steerer tube and an English BB**********

Old 01-05-15, 01:26 PM
  #1  
RiseAlways
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Peugeot Super Competition with a French steerer tube and an English BB**********

So the steerer tube on my super competition failed (mainly my fault as I had a cinelli stem I was fitting into it,..it went in for about 1.5-2" then stopped, when I tapped it that's when the steerer tube snapped),...so it's being fixed now.
However, perhaps it's just me,...but I had not heard of a Peugeot PX10 Super Competition having BOTH French AND English threading on itself??
As I said,.. has anyone ever run into this? A French threaded steerer tube and an English threaded BB?

Soon to be finished,...(hopefully??)....

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Old 01-05-15, 02:06 PM
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In the early to mid 1980s, Peugeots had weird mixes of sizing. They went from French BB to Swiss to English. From French stem to English. I'm not sure there was a lot of rhyme or reason to it. It is also possible the fork was changed out, along with the headset upper race.
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Old 01-05-15, 07:12 PM
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Maybe the BB was re-tapped to accept BSC threaded BB's......... or the original fork was replaced.....????
Who knows..... The French had done weirder stuff, so don't be surprised if it came out of the factory that way too.....
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Old 01-05-15, 08:17 PM
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Originally Posted by Chombi View Post
Maybe the BB was re-tapped to accept BSC threaded BB's......... or the original fork was replaced.....????
Who knows..... The French had done weirder stuff, so don't be surprised if it came out of the factory that way too.....
That was my thinking about the fork,... perhaps a replacement?
I know at the early 1980s things were switching out at Peugeot,...I guess this was the odd ball in-between.
Thanks guys.
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Old 01-05-15, 08:47 PM
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That is very common on 80's french bikes, nothing to worry about. This one had the same thing.

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Old 01-05-15, 09:52 PM
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The frame builder who's doing the work is going to simply cut the original steer tube, sleeve it and mate an English threaded steer tube to the fork, thus making life a bit simpler. I'm looking to take this bike racing next year, so I'm looking to make it stout,...a sleeve will certainly beef up the steer tube. I'll be on the lookout for a replacement fork though,... just as a "in case" thing.
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Old 01-05-15, 10:05 PM
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My 1980 PKN-10 Competition had Swiss BB and English handlebar stem diameter (22.2mm = 7/8").
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Old 01-06-15, 01:05 AM
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Agreed, during the 1980's Peugeot transitioned from French to BSC (with a few Swiss) bottom brackets. My 1985 PH 501 had a French fork/stem and BSC bottom bracket (as did most of the 1985 and 1986 Peugeots). A bit of caution, if you are going to switch to a BSC steerer and headset, be aware that the French quill stem is a little undersize for a BSC steerer. While it will fit and tighten up just fine, it will put additional pressure inside the steerer where the split wedge tightens against the inside wall of the steerer tube. I did this on my bike when I replaced the original fork with a BSC fork (and BB). Years later the steerer split along the steerer groove (which in this case extended over where the split wedge was positioned inside the steerer). I still use the French quill stem with a BSC fork, but the fork I am using was cut (and a few threads added) so the groove is very short and does not extend down where the stem split wedge tightens inside of the steerer.

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Old 01-06-15, 11:09 AM
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Originally Posted by onespeedbiker View Post
Agreed, during the 1980's Peugeot transitioned from French to BSC (with a few Swiss) bottom brackets. My 1985 PH 501 had a French fork/stem and BSC bottom bracket (as did most of the 1985 and 1986 Peugeots). A bit of caution, if you are going to switch to a BSC steerer and headset, be aware that the French quill stem is a little undersize for a BSC steerer. While it will fit and tighten up just fine, it will put additional pressure inside the steerer where the split wedge tightens against the inside wall of the steerer tube. I did this on my bike when I replaced the original fork with a BSC fork (and BB). Years later the steerer split along the steerer groove (which in this case extended over where the split wedge was positioned inside the steerer). I still use the French quill stem with a BSC fork, but the fork I am using was cut (and a few threads added) so the groove is very short and does not extend down where the stem split wedge tightens inside of the steerer.
Thanks for the heads up....I have a 22.2 stem im going to use on it...id rather just keep it french but Im not sure the fellow who is doing the work has the french threading die??
Whats my best option do you think? Keep it french threaded or go britches thread?
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Old 01-06-15, 12:06 PM
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Originally Posted by RiseAlways View Post
Thanks for the heads up....I have a 22.2 stem im going to use on it...id rather just keep it french but Im not sure the fellow who is doing the work has the french threading die??
Whats my best option do you think? Keep it french threaded or go britches thread?
If you want to use the 22.2 stem with a French Thread, then you may have to sand down the stem to make it fit the steerer and/or headset locknut. From Sheldon Brown.

French stems are 0.2mm narrower than others where they fit into the steering column. A standard 7/8" / 22.2mm stem won't usually fit. In many cases, the limiting factor for fitting the stem in will be the headset locknut, rather than the steerer itself. Try removing the locknut before sanding down a stem. If the headset locknut is slightly tighter than the steerer, it can be enlarged easily with a small grinding wheel. If you convert from a French stem to a standard one, you will also need to replace the handlebars, which are a different diameter. French Bicycles

But the best option depends on how important it is the keep the French threading. With BSC threading you have an endless supply of stems and headsets, but it won't be French. Also, if you want to use your BSC stem, you may need to replace the handlebar. Many of the PX10 came with Cinelli stems with the old 26.4 size. . The catalogs show the 79-81 Super Competition coming with the Peugeot ATAX Quill Handlebar Stem which should be 25mm. My 85 PH105 came with a CTA stem with a 1" clamp, but early bikes came with the smaller French sizes 23.5mm/ 25mm

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Old 01-06-15, 04:29 PM
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Originally Posted by onespeedbiker View Post
If you want to use the 22.2 stem with a French Thread, then you may have to sand down the stem to make it fit the steerer and/or headset locknut. From Sheldon Brown.

French stems are 0.2mm narrower than others where they fit into the steering column. A standard 7/8" / 22.2mm stem won't usually fit. In many cases, the limiting factor for fitting the stem in will be the headset locknut, rather than the steerer itself. Try removing the locknut before sanding down a stem. If the headset locknut is slightly tighter than the steerer, it can be enlarged easily with a small grinding wheel. If you convert from a French stem to a standard one, you will also need to replace the handlebars, which are a different diameter. French Bicycles

But the best option depends on how important it is the keep the French threading. With BSC threading you have an endless supply of stems and headsets, but it won't be French. Also, if you want to use your BSC stem, you may need to replace the handlebar. Many of the PX10 came with Cinelli stems with the old 26.4 size. . The catalogs show the 79-81 Super Competition coming with the Peugeot ATAX Quill Handlebar Stem which should be 25mm. My 85 PH105 came with a CTA stem with a 1" clamp, but early bikes came with the smaller French sizes 23.5mm/ 25mm
I actually found (hard to come by as it ewas) the correct french sized 1A Cinelli stem in the size I was looking for. Ironically now I'm thinking about having it fixed with standard brit sized steer tube,.. but that's my question now,..

Do I have him keep it french to stay original or just say to heck with it and make it brit thread and diameter instead to keep things easy...after all they did have "some" that went to brit sizing at this time??
Mine came with the Atax stem and Phillipe handlebars,.. I got an early 1980s Cinelli handlebars and have both the french quill sized stem and the brit sized stem here,.. so I can go either way very easy.

FYI this is a 1981 Super Comp bike,.... so that may play a part in the consideration of what to do on the stter tube????
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Old 01-06-15, 05:33 PM
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Originally Posted by RiseAlways View Post
I actually found (hard to come by as it ewas) the correct french sized 1A Cinelli stem in the size I was looking for. Ironically now I'm thinking about having it fixed with standard brit sized steer tube,.. but that's my question now,..

Do I have him keep it french to stay original or just say to heck with it and make it brit thread and diameter instead to keep things easy...after all they did have "some" that went to brit sizing at this time??
Mine came with the Atax stem and Phillipe handlebars,.. I got an early 1980s Cinelli handlebars and have both the french quill sized stem and the brit sized stem here,.. so I can go either way very easy.

FYI this is a 1981 Super Comp bike,.... so that may play a part in the consideration of what to do on the stter tube????
Again, it's what you want. First, while Peugeot changed to BSC bottom brackets in the 80's they still stayed with French threaded steerers and French stems. Since you seem to have two sets of French stems and handlebars, I would go with the French; it will also give you better bragging rights..
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Old 01-06-15, 06:02 PM
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The crown race is probably 27.0
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Old 01-06-15, 06:03 PM
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Originally Posted by RiseAlways View Post
So the steerer tube on my super competition failed (mainly my fault as I had a cinelli stem I was fitting into it,..it went in for about 1.5-2" then stopped, when I tapped it that's when the steerer tube snapped),...so it's being fixed now.
However, perhaps it's just me,...but I had not heard of a Peugeot PX10 Super Competition having BOTH French AND English threading on itself??
As I said,.. has anyone ever run into this? A French threaded steerer tube and an English threaded BB?

Soon to be finished,...(hopefully??)....


If you a need decal set I have one.
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Old 01-06-15, 08:50 PM
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Originally Posted by Michael Angelo View Post
If you a need decal set I have one.
This is after I blasted and repainted it,... the decal set on it came from a place in the UK,... its ok,.. but,..well,... if the paint job ever gets beat up, I'll redo it and look for a real decal set!!! (yours perhaps!!) haha...
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Old 01-06-15, 08:52 PM
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Originally Posted by onespeedbiker View Post
Again, it's what you want. First, while Peugeot changed to BSC bottom brackets in the 80's they still stayed with French threaded steerers and French stems. Since you seem to have two sets of French stems and handlebars, I would go with the French; it will also give you better bragging rights..
Just talked with the fellow doing the fix on the steer tube,..he doesn't have the proper dies to thread it french,.. oh well. So we're going brit.

Which leads me to a related question,...I noticed a ton of team riders for Peugeot using 1R Cinelli stems,... anyone have one in a size 70mm they want to part with??
I have an earlier one I was going to use, but I think I'd rather stick close to what was used,...
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Old 01-07-15, 01:51 AM
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There is nothing that says you can't use the French stem in a BSC steerer; as I said before it is only .2mm smaller. The only reason my steerer split was because the steerer groove was cut far enough down the stem that it went past where the split wedge was engaging the inside of the steerer. If you are really concerned you could have your "fellow doing the fix on the steer tube", fatten up the inside of the BCS steerer from 22.2mm to 22mm and the French stem would be a perfect fit (and you would have a way cool setup to boot).
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Old 01-07-15, 08:29 PM
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Originally Posted by onespeedbiker View Post
If you are really concerned you could have your "fellow doing the fix on the steer tube", fatten up the inside of the BCS steerer from 22.2mm to 22mm and the French stem would be a perfect fit (and you would have a way cool setup to boot).
True,.. that would work,... I'll run it past him and see what he thinks of the idea.
He's actually a friend of a friend,... a local frame builder here. Builds great frames!!
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