It is the size of the internal threads that are inside your cranks at the axle. If you use the inside diameter part of your calipers, you will get slightly less than 22mm, like maybe 21.8 to 21.9mm as a measurement. If it were 23.35mm, then you would get about 23.1 to 23.2mm.

In that case you probably have a post-1982 Stronglight crank, and a standard 22mm puller will work.

Crank internal thread diameter measured 21.2mm
Rear dropouts measured 121mm

Things to purchase, crank puller and wheelset

Once I get the crank off and do some double checking measurements, I plan to purchase a crankset (suggestions?) and the VO french threaded BB

I will go 1/8 inch for the chain

Definitely standard 22mm crank puller and standard 120mm track hub dropout spacing. You can find a lot of wheel selection at decent prices at Velomine and also Ben's online Vendio store (not eBay). As for cranks, it's depends on your budget. Just make sure you get a crankset that matches the JIS taper of the VO BB.

I'm thinking of going with this Mavic wheelset...I'll mostly be commuting and I'm trying to keep things on a budget http://www.bicyclewheelwarehouse.com...d&productId=22

Yeah, Mavic wheels....keep the French theme. I've got roughly the same bike. I kept the original Stronglight cranks, though.

As for getting the cranks off, I wouldn't purchase a crank puller for a one time use like this. Large flathead screwdriver between the outside of the BB cup/lockring and the inside of the crank arm works. Couple taps to get it started, then a couple bangs to knock it off.

yeah, i'm quoting myself...

I bought these.

And I bought an Eighthinch 165mm 46T crankset in silver

I've got those wheels, and I like them a lot.

I used this crank puller on my '77 Gitane Gypsy Sport, and it sounds like it would work for you also.

Did I tell my story about my Gitane having an English threaded bottom bracket on this thread yet? Don't assume French threading on low-end French bikes. Remove the adjustable cup first and then look inside and you should be able to see the threads on the fixed cup, like this:

http://farm4.static.flickr.com/3587/...f761da10f2.jpg

The fixed cup can be a major pain to remove. Mine had some non-standard-sized edges that didn't fit any of the tools at the LBS. I ended up making a tool based on Sheldon's tips and about $3 in parts from the local hardware store. It looked like this with the cup still clamped in:

http://farm4.static.flickr.com/3629/...29fb211b_o.jpg

This picture of the top washer after I was done may give you an idea how much force was required to get it off:

http://farm4.static.flickr.com/3614/...29fb5d3c_o.jpg

You don't want to apply that kind of force in the wrong direction!

Thanks for the advice Andy_K. I actually almost bought the VO French Threaded BB today but then thought I should wait until I got the cranks off and could get a good look at the threads

hopefully this doesn't get too difficult... although that would add more of a sense of accomplishment

I converted my UO8 a year ago. I used the Shimano UN72 bottom bracket, removed the cups, and bought Phil french thread ones. This was before Velo Orange offered their BB.

Other than that, the only other hard thing was the stem. It needs to be 22mm. I bought a Origin8 22.2mm stem, and just used sandpaper to sand off the extra .2. Easy

I had some random Promax seatpost sitting around, but it was too large. I went over to the shop and used a lathe to cut it down for fun.

Check it out:Peugeot UO8

And I have since updated it to this: Peugeot UO8 Revision

I would get these wheelsets http://cgi.ebay.com/700C-ROAD-BIKE-T...item2eab10a130

I also have this wheelset. very nice

Can't believe the peanut gallery is going to let that one by without comment.

It took three months of riding before the original stem came loose on mine so I could replace the headset. I've gotta say, that was like pulling Excaliber from the stone. On the other hand, it would have been nice if it had just come out in the first place. My bike was sitting in somebody's barn for about 30 years, so you'll probably have better luck than I did.

If you don't want the derailleurs, I would be happy to give them a new home... ;D

I will be reusing the original stem and seat post for now
Nice ride though

The peanut gallery in my head told me not to listen to that idea...I'ma get myself a crank puller

Got anything I want? I like bartering.... :)

So, how exactly do I determine if the current BB is a French thread?

Bro you like pretty old for 25

Bro, you sound pretty dumb

The difference in diameter and thread pitch between French and English threading is tiny, so it is very difficult to tell by measurement. The big difference is that the right side fixed cup threads are left-hand threaded on English and right-hand threaded on French. So, if your current right BB cup unscrews counter-clockwise, then it is French, and if it unscrews clockwise, then it is English.

You are almost guaranteed to have a french thread with that model UO8.

finally got the right side bb cup off today. it unscrewed by turning clockwise, so this is an english thread, right?

does this seem peculiar to anyone else? the crank seems to be a post 82 stronglite crank but the frame is definitely pre 1980, and the bb is an english thread? i guess i'm a little confused as to what model peugeot this is, I thought it was a 78 UO9...

Maybe. It could also be left-handed Swiss thread. Are there any markings stamped on the fixed cup? 2 rings means it is English, whereas no rings means it's Swiss. Also, does the fixed cup have 8 flat sides? If not, then it's not a Stronglight BB, although Stronglight is one of the few old manufacturers that made Swiss BBs. Swiss thread is the same as French thread, 35.0mm x 1.00mm, whereas English is 1.370" x 24 TPI (34.8mm x 1.06mm), which are so close it is very easy to confuse them. Anyway, at this point I'd suggest you re-post this on the C&V forum, where you should get some more definitive answers. There are some real vintage Peugeot and French bike fanatics over there.

not done yet, but it was a nice day out, so I had to get a picture.

still want to wrap bars, get a new saddle, and a front brake

http://farm3.static.flickr.com/2694/...cf78406a_o.jpg