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1972 Peugeot UO-8 fixed gear conversion

A 2023 recreation of my commuter in graduate school

Frame:
1972 Peugeot UO-8 frame

Fork/Headset:
Peugeot fork, headset

Crankset/Bottom Bracket:
Bontrager Nebula crank, Velo Orange French-threaded BB

Drivetrain/Cog/Chainring/Chain:
44/17t drivetrain, KMC S1 chain

Handlebars/Stem:
Raleigh drop bars, Sturmey Archer stem (sanded to fit fork)

Saddle/Seatpost:
AGDA leather saddle, Sakae CR seatpost (sanded to fit frame)

Brakes:
Mafac "Racer" calipers, Dia Compe aero levers

Front Wheel/Hub/Tire:
Alloy hub > alloy rim > Freedom ThickSlick 700x25c tire

Rear Wheel/Hub/Tire:
Alloy hub > alloy rim > Freedom ThickSlick 700x25c tire

Added by chibitmin. Last updated 12 months ago.

As of 12 months ago, chibitmin has indicated that they no longer own this bike.

10 Comments

jlwoodr3

jlwoodr3 says:

Thanks for all the tips! I did not end up having to grind the serial plate rivets down thankfully. Got a 170 mm crank from velo orange to fit the 107 mm BB and it worked perfect! Ride is so much smoother than with the old BB.

Posted 11 months ago

chibitmin

chibitmin says:

Happy to help. Yes, those new VO BBs are wonderful compared to the original ones. Enjoy!

Posted 11 months ago

jlwoodr3

jlwoodr3 says:

Nice build! What was the spindle length on your VeloOrange BB? I am trying to do a similar conversion on my 1972 u08.

Posted 11 months ago

chibitmin

chibitmin says:

Thanks! I ended up with a 107mm spindle. That was based on the particular wheel/cog I had. From the calculation*, I think 104mm would've been "perfect" but that size wasn't readily available.

Posted 11 months ago

chibitmin

chibitmin says:

*I'm trying to find the page about determining spindle length if you only have a wheel/cog. I'm pretty sure Sheldon Brown had an article about it, but I can't find it anywhere...

Posted 11 months ago

jlwoodr3

jlwoodr3 says:

Thank you for the tips and for your response! I am doing this build in stages and thinking about a 110 spindle to fit this VeloOrange crankset (https://velo-orange.com/collections/cra...) and then I will change the 5 speed freewheel for a single speed freewheel down the line and just add spacers to get the desired chain line. All of the VeloOrange stuff looks so slick. I am stoked to replace the original cottered cranks. Please let me know if you have any other recs!

Posted 11 months ago

jlwoodr3

jlwoodr3 says:

Actually looks like the 110 won't be available until September/November. Now thinking I will go with either the 107 or the 113. Any thoughts?

Posted 11 months ago

chibitmin

chibitmin says:

It sounds like you're planning on keeping the wheel and just changing the cassette out, right? I don't think there's any harm in your plan, as long as you have the right spacers to get the right fit.

Posted 11 months ago

chibitmin

chibitmin says:

Oh! I do have something else to add-- do you see how the serial number plate is riveted onto the BB shell? Do you have one of those too? If so, you might have to grind the rivets down a little inside the BB shell prior to putting in the new BB. Before I did that, I was wondering why the new BB didn't fit, almost stripped the threads but quickly realized the issue.

Posted 11 months ago