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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 03-11-11, 07:26 PM   #1
CottonMouth
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80s Peugeot Mystery BB

Hey all, this is my first post on anything like this. I just got into riding fixed gears and am in the process of building (more like "completing") My first. From what I gathered It seems to be a 82-84(?) which also seems to be right around when Peugeot started making there switch from french to swiss to BSA.. Im curious if you guys could help me narrow down the model, year, and possibly set me off in the right direction for purchasing a new crank and bottom bracket.... This may not be too easy, because the bike was a single speed at purchase, and had no gears, derailers, and an aftermarket wheelset. I do have the original (I believe) cranks, stem, and brakes. Its a Non-Lugged, Carbolite tubing. What else do you need to know to tell me what I need to know?
Either way, I have a pic of what she looks like now, and can take more if you need them to help me identify this bad boy.
Thanks Guys!

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Old 03-11-11, 08:20 PM   #2
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Start with what you know. You always remove the left (adjustable) cup first. That;s helpful because ALL left cups are RH thread, so you can't go wrong unless you're dyslexic.

Once the left is off, you and measure it, or if that doesn't help look across the shell and see if you can tell the thread direction.
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Old 03-11-11, 08:23 PM   #3
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Start with what you know. You always remove the left (adjustable) cup first. That;s helpful because ALL left cups are RH thread, so you can't go wrong unless you're dyslexic.

Once the left is off, you and measure it, or if that doesn't help look across the shell and see if you can tell the thread direction.
Or look for markings on the cup itself. If it says 35 x 1 or 35 x P1, it's either French or Swiss. If it says 1.37 x 24 (or similar) it's English.
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Old 03-11-11, 09:15 PM   #4
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Ask that dude on the bench. He looks like he knows something.
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Old 03-11-11, 09:18 PM   #5
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If there are no lugs visible it may be a Canadian made peugeot, constructed with their Direct Brazing System (DBS). If this is true then it likely has a British threaded BB, but I am not sure. Very unlikely that it would be French.
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Old 03-12-11, 02:20 AM   #6
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The dude on the bench still cant comprehend the difference between a schrader and a presta... But my funny lookin pal sure makes my whooped up bike look better.
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Old 03-12-11, 02:32 AM   #7
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I cant find any external markings, so i guess its down to the lab to get them crank arms off and see what we can find out. this is a first for me, so... yeah. wish me luck, fellas.
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Old 03-12-11, 05:26 AM   #8
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First of all,
Thank you guys for all the responses and love toward the art of pedaling!

Now, after a few brews and a nice smoke break... I have successfully removed my first bottom bracket (Hooray!), without damaging anything or losing all the (loose) bearings. The (left) adjustable cup was indeed standard threading, as for the fixed/sprocket side, the threadings were reversed. Where do I take it from here Mr.FBinny?
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Old 03-12-11, 05:32 AM   #9
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In case you were wondering...
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Old 03-12-11, 06:37 AM   #10
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Hmmm, seems like im at 35 mm if im measuring correctly...
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Old 03-12-11, 06:37 AM   #11
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Which would lead me towards Swiss?!?
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Old 03-12-11, 07:11 AM   #12
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Which would lead me towards Swiss?!?
Maybe, maybe not. Swiss is 35 mm while English is 34.8 mm. I doubt your ruler can tell them apart. Take the frame to an LBS and have them try an English fixed cup in the threads. That will tell you immediately which it is.

Smoke break?
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Old 03-12-11, 07:23 AM   #13
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Thanks dude, the guys at my bike shop are pretty good to me... Im just not sure how Ill make it across town now that I pulled my bike apart, haha.
Thanks for the heads up on how close the two truly are, Ill rely on the local talent to make sure Im not purchasing unnecessary parts.
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Old 03-12-11, 07:28 AM   #14
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As for an approximate year on the bike? Am I not gonna be able to narrow it down from my slightly educated guess of 82-84? Have my chances of finding my particular "matching" model been dramatically reduced due to a lack of original components?
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Old 03-15-11, 12:24 AM   #15
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Alright, turns out to be standard threading, this should make things easier!
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