Updated Picture - check out thumbnails below for detailed pics

Nearby frame available for $100. I'm guessing it's PX10 based on frame/fork stickers and chromed stays.

Calling experts - buy / no buy - PX10 / other?

My PX10-E looked like that, before I repained it thirty years ago. I do not think the UO8 had the chrome and I know they were not 531.

yes, and buy it if it fits

everything fits robtown.


although, I think that one actually does.

I do have a full set of Mafac brakes. I sold them on ebay and they took a 5 month round trip to Thailand. The buyer has not responded to my emails.
Would the BB be English thread? I also have a stem but I'm not sure Peugeot is standard sizing.

Pretty much guaranteed it's French threaded all around. Stem is likely French diameter as well. Neither are really a big deal. Since getting a french bike lately myself I actually have accidentally acquired to much (if there is such a thing) French threaded/diameter stuff. It's not really hard to find or expensive...

French threads, and to be 'correct' you'd probably want to put period Stronglight cranks on it, which require a particular crank puller:
https://www.velo-orange.com/jast23stcrpu.html

Definitely buy it. The paint and decals appear to be in good condition overall, and everything would certainly be French threads and dimensions... but not a big problem.

You can expect the stem diameter you'll require to be 22.0 mm versus standard 22.2 mm., and the seatpost you'll need will likely be 26.4 mm. The Simplex dropouts will probably require a Simplex derailleur to fit neatly in the unthreaded 9 mm derailleur hanger... but none of these French bike quirks are any major problem at all. You can also work around the stem and the derailleur issues quite easily if you decide you want to use non-French components.

+1 buy buy buy!!!

I haven't researched this recently, but one thing that might be a little harder
to find is the rear derailleur that would fit the French threads in the hanger.
The PX-10 I have is tapped (since the French are a bit smaller) for standard
threads

If one does not wish to tap it, one can always go the worst-case route and stuff an NOS Simplex Prestige on it as a temporary substitute - they're common enough, anyway.

-Kurt

UO-8s were definitely not made of Reynolds 531. You can actually feel the seam in UO-8 stays and fork blades, at least the ones made after 1970. UO-8s were also not made with Nervex Professional lugs and Simplex dropouts.

If there is no serious damage to this frame, grab it before I do. It would fit me nicely.

I'll keep you in mind in case I don't follow through on a build. I do have some period correct parts but my short term goal will be to get her on the road.

Not much to ad here....

Anything and everything you could possibly need/want for it is readily available on Ebay.

Notce that only the headtube has fancy Nervex lugs while the seat, BB and fork lugs are 'plain'.

I have a 1975 jeunet with italian threaded BB, the BB feels slightly ovalized on the non-drive side, but in anycase I assume it was rethreaded. The bike was painted and had braze-ons added in the mid 1980s so I assume it was retapped at that time, It also have a french threaded headset but at 22.2mm stem fits fine. Another odd quirk is that it appears the threads (at least all the ones which are engauged have been replaced! As in someone brazed on about 2 inches of threaded stear tube. This seemed sort of alarming, but I guess I have been riding it for two years and the previous owner used it for at least 10 after all the work was done in the 80s... so I figure it's alright. I guess my point is that if you just want to ride it, you can pretty much unfrenchify almost everything. Mine is a fixed gear and only a main triangle 531, I recently alligned the frame and fork. It is a beater so I couldn't care less about all the mods.

Come on! All this talk about de-french threading stuff.....This stuff is not rare. It turns up on da 'Bay almost daily. Several companies have NOS or are still making stuff. It's rarely overly expensive unless you're after high end stuff. My one word of advise is don't buy incomplete bottom brackets unless you have access to a ton of spindles....
Been there....Done that!
For the rear derailleur as mentioned before......You can buy NOS Simplex Prestige for around $30. The SLJ 5500's will cost $50-$60 used which is compareable to NR (except the 78 date code for some reason). Even VeloOrange has a cheapo Simplex that's all metal for like $10! Headsets are usually going for around $30-$50 even for the nice ones.
A little tip...When searching ebay use the measurements for components like "35 x 1" for bottom brackets. Search title and description world wide. Sometimes people don't know what they have. Memorize what a SLJ looks like and browse for Simplex, Spidel and Gipiemmie derailleurs.
Hunt on French eBay too. I like to just type in velo ancien..... Sometimes you'll get lucky. Just watch the exchange rates so you don't get ripped.
I like google alerts too. I've found some neat stuff that way. Maybe use one of those Criagslist searchers that search Craigs worldwide......And ask if they will ship. I got some Topline cranks for $25 that way.
Geez...Probably shouldn't have given away my tips. I've noticed in the last year people are catching on to the SLJ one. The price has doubled or more in some cases!

Oh....And don't forget the Phil rings and Shimano UN72 trick! That can save some serious coinage on a nice sealed cartridge BB with an adjustable chainline.

Sorry Kpug, I don't mean to with that onto this frame, just sayin'. I have so much english and italian stuff kicking around in the parts bin that it doesn't makes sense to buy french when I have other. I am very happy my frenchy has been blasphemized, but if I had a sweet Lejeune or something of that calibre I'd definitely keep it french.

Sorry for the misunderstanding .......Wasn't aiming at you specifically. It's just every time one of these French threaded threads comes up someone has to suggest drilling this, tapping that, so on and so forth.
I just don't really see the point in todays day and age. I'm sure a few years ago prior to the advent of interweb trade it was an issue when parts supplies dried up stateside. I do see the derailleur problem becoming an issue soon though.....BB's not so much. There are 2 companies currently making them (They are just to expensive) and VeloOrange has a prototype in hand. VO has talked about headsets too.....

Rant over.......Sorry peeps. I think I'll go ride my bike now!

This is what made me say, PX-10!!! YESSS!!! For $250 I bought one in boxes that is not nearly as nice, tho it's rather older ('68 or so) and has all its French bits. You can make a really fine bike from this frame. Might take longer than with say a Nishiki, but it will be sweeter for the effort and for la vie Francais!

edit: La vie Francais aside, it'll be easier to score yourself a set of 120 mm Campy Record-based tubular wheels than the original Normandy Luxe Competition wheels with the Montlery rims. I'll forgive you if you just get the Campy's. They'll still fit. She won't throw you.

I do have a pair of Campy hubs, freewheel rear that is 120mm. I'd get that laced to some Sun 700 M13II silver box clincher rims. That would be later if the hubs shine up properly. For now I have a set of Dura Ace hubs, with a 6 speed DA freewheel and Matrix ISO rims. I also have simplex DT shifter and some original Mafac brakes. Chris, at Veloorange, says they have a $20 Simplex RD that should fit. I also have a Campy NR crankset for now.

The seller might bring the frame by tonight 8:30pm EST - saving me a couple hour round trip
he's on his way - with a RD, brakes, and handlebars!

It does have the 531 frame and fork stickers. The paint finish has some scrapes but some simichrome and compounding will bring her beauty out.
The seller brought along Mafac calipers, the handlebar, and both Simplex derailleurs! I gave him an extra $10 for gas.

Sweet!

On a different note.....Just found NOS TA BB cups. You would just need to find the right spindle which can be a major PITA!
https://www.sjscycles.co.uk/src/froog...x-1mm-3572.htm

Well, well, cyclotoine... so I'm not alone, after all.

First of all, I have noticed in the past that many 22.2 stems will fit in some French steering tubes. It is always worth checking whether the inner diameter of a steering tube will accept more common stems. Sometimes it is only the top lock-nut of a headset which will present the "obstruction". If this is the case, it is easy to grind the inner circumference of the lock nut down a bit with a Dremel-type rotary tool and a small sanding drum attachment.

More interesting to me is that I too have had a French frameset pass through with a welded modification to the steering tube. I was truly shocked. I had removed the old headset to see if there would be enough length on the steering tube to put on a different headset with a somewhat higher stack height than the lower quality headset found on the bike. It was then that I discovered the suspicious "groove" cut into the rear of the threads rather than the flat file marks for the more usual "D" shaped washers typically found on French bikes. When I completely removed the fork, I found that almost half of the steering tube - including the threaded section, of course - had been carefully welded onto the top. The threads were indeed British!

This seemed a remarkably bothersome way to use a more common headset rather than to just find a replacement French threaded one - since this was apparently done when French headsets were still aplenty. Never seemed to compromise the strength of the fork, so no harm done... but how odd! I wonder whether this was more common than I ever would have imagined?

[QUOTE=robtown;7946970]
Cool, I'm curious to see what you do with it. Sounds like a good deal on a nice 531 frame set.

Check out how similar the fork is to this Raleigh Competition GS fork I had.