Peugeot Pipeline 1 Cruiser - Seat post?

[justinc97]

Hey All, I picked up this bike a few months ago and have been sitting on it. I bought it with a bum seat post jammed in there with duct tape. Looks like the tube is still fine, but I am having trouble identifying the correct seat post size I need. Anyone have recommendations for figuring out the correct size?
Already stopped by a local bike shop but they were less than helpful stating that the tube looks damaged and it isn't worth fixing it. They thought it was a 25.4 so I ordered one online but it was way to big to fit.

Planning on turning this one into a 26 BMX cruiser and am open to recommendations for colors and parts!

 

[RustyGold]

Well... your lbs sounds like it sucks .

If the top of the seat tube is too distorted to get a measurement from with a set of calipers (vernier/dial/digital)...then you will need to find a machinist buddy who can measure it...or, pick up some cheap telescoping gages or inside calipers (joint/spring) to do a transfer measurement.

 

[MattiThundrrr]

Sheldon has a list of seatpost measurements. Don't see that specific model, but perhaps something else in the same era will be useful
Lots of different Peugeot sizes
https://www.sheldonbrown.com/seatpost-sizes-m-z.html

 

[MattiThundrrr]

Peugeot...
"Depends on the grade of tubing and the manufacture. Many of Peugeot's bikes have the last ~3cm of the seat tube reduced to a smaller diameter - and this is true through low-mid range bikes and continued at least into the mid-late 80s"
From this thread:

https://www.bikeforums.net/classic-vintage/1078290-peugeot-seatpost-size.htmlHere is a database
https://www.bikeforums.net/classic-vintage/352534-peugeot-seatpost-database.htmlI'd guess 24 mm. Good luck, man

 

[Chuy]

Here’s my pipeline 1. It has a 24.8 seat post.

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[justinc97]

Here’s my pipeline 1. It has a 24.8 seat post.

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This is what I was looking for! I will give the 24.8 a try! Thanks a bunch
What are your plans for that frame?

 

[Chuy]

I previously had it built up as a single speed bmx cruiser, but I stripped it down to make space for other projects.
I brought it down from storage to get your seat post size.

Here’s how it use to look.

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[Karate Chicken Industries]

I keep at least one crummy steel seatpost of every different size possible that I have come across, reserved mainly for measuring purposes beyond what my caliper can accomplish.

 

[justinc97]

Doing some quick searching around it seems like 24.8 is a rare size.
Does anyone know where I could find one? or has anyone had luck buying a 25.0 and sanding it down?

 

[Chuy]

Sucks, I’m remembering now that I too was looking for another post online as I had never seen a 24.8 before. In the end I narrowed it down to 2 options, find tanother Peugeot and yank that post or have a machine shop make me a nice aluminum one.

I went with getting another looptail Peugeot in blue or red, I’ve been looking since!

Good luck dude!


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[Captain Awesome]

I'd go with, find a machine shop and have them turn you one

Mild steel
Stainless
Aluminum
Titanium

Whatever.......

 

[Karate Chicken Industries]

I concur with the machine shop option.

 

[Verrt]

You might have already solved this

But, once you have the old post out, an option is to take the frame to a local bicycle co-op and sit by the seat post bucket trying every post until one fits.

I've done this to find a stem that fits a Peugeot.