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Old 07-10-07, 08:40 PM   #1
tjspiel
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Low end Puegeot Frame weights: 70's UO8 type vs. HLE

I can't remember offhand what the pre-Carbolite tubing was called but my wife has a 70's Peugeot made from that and I have an 80's Peugeot with HLE tubing.

My bike seems substantially lighter by my non-scientific measurements (just picking them up). I did replace the steel rims on my wife's bike but it still has steel cranks (which can't be light) and steel handle bars. Would that account for most of the weight difference or is it really the frame? Her frame is also a bit smaller.

Just curious.
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Old 07-10-07, 08:48 PM   #2
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I think my 55 cm UO8 frame weights about 6 lbs without the fork.
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Old 07-10-07, 10:11 PM   #3
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If I recall the UO8 says "Tube Special Allege Peugeot" which I think translates as "Peugeot Special Heavy Gaspipe Tubing" (ok, actually I think it means Peugeot Special Light Tubing"). I had exactly the same impression between an early 70's UO8 and 84 HLE Peugeot (I forget the model). My bathroom scale said 24-lbs for HLE bike vs. 27-lbs for the UO8 with aluminum rims AND stem/bars. Being a dumba$$, I threw out the 84 Peugeot cuz it needed some work and bunches of people said HLE was gaspipe junk. Only later did I realize that it was a very nice bike even if not top of the line. The UO8 has somehow hung around all these years like bad grass and recently got a tuneup. I commute to work with it occasionally.
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Old 07-10-07, 11:34 PM   #4
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Originally Posted by Kommisar89
If I recall the UO8 says "Tube Special Allege Peugeot" which I think translates as "Peugeot Special Heavy Gaspipe Tubing" (ok, actually I think it means Peugeot Special Light Tubing"). I had exactly the same impression between an early 70's UO8 and 84 HLE Peugeot (I forget the model). My bathroom scale said 24-lbs for HLE bike vs. 27-lbs for the UO8 with aluminum rims AND stem/bars. Being a dumba$$, I threw out the 84 Peugeot cuz it needed some work and bunches of people said HLE was gaspipe junk. Only later did I realize that it was a very nice bike even if not top of the line. The UO8 has somehow hung around all these years like bad grass and recently got a tuneup. I commute to work with it occasionally.
"Tube Special Allege Peugeot" - that's the stuff.

Well I went ahead and weighed the two bikes and there was a 2.2 lb. difference. It's less than I thought but not insignificant. I wonder if one were to replace the steel seatpost, crankset, and heavy pedals how close they would get. I'd bet you could knock off over a pound that way.
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Old 07-11-07, 08:29 AM   #5
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Originally Posted by tjspiel
"Tube Special Allege Peugeot" - that's the stuff.

Well I went ahead and weighed the two bikes and there was a 2.2 lb. difference. It's less than I thought but not insignificant. I wonder if one were to replace the steel seatpost, crankset, and heavy pedals how close they would get. I'd bet you could knock off over a pound that way.
That crank alone has to weigh a ton. If you think about it, the difference between a typical aluminum crank today and a light carbon fiber can be nearly a half pound I'd bet going from all steel to alloy would save a bunch. Not sure about finding the seatpost though - mine uses some weird size with a shim.
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Old 07-11-07, 08:42 AM   #6
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The greatest performance improvement (and weight savings) you can make to the UO8 is to replace the wheels with light weight alloy hubs/rims and replace the crankset with a lightweight alloy set. While you're at it, put on an alloy or carbon bar and stem also.
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Old 07-11-07, 09:18 AM   #7
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Originally Posted by Kommisar89
That crank alone has to weigh a ton. If you think about it, the difference between a typical aluminum crank today and a light carbon fiber can be nearly a half pound I'd bet going from all steel to alloy would save a bunch. Not sure about finding the seatpost though - mine uses some weird size with a shim.
Replacing the crank might be worth it, but since it's an old French bike with cottered cranks, there are a number of caveats. I'm sure I'd have to replace the spindle and cups as well, which would take me to a new level in my bicycle mechanical abilities.

I think I'll leave the seat post.
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Old 07-11-07, 09:21 AM   #8
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The greatest performance improvement (and weight savings) you can make to the UO8 is to replace the wheels with light weight alloy hubs/rims and replace the crankset with a lightweight alloy set. While you're at it, put on an alloy or carbon bar and stem also.
The hubs and rims have already been replaced. The crankset, I'm contemplating but I have a number of other (non-bicycle) projects that probably should take priority. I can find a decent used crankset easily enough but I think I'd need a new spindle and cups which will also add to the cost and complexity.
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Old 07-11-07, 09:38 PM   #9
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Originally Posted by tjspiel
The hubs and rims have already been replaced. The crankset, I'm contemplating but I have a number of other (non-bicycle) projects that probably should take priority. I can find a decent used crankset easily enough but I think I'd need a new spindle and cups which will also add to the cost and complexity.
I've read that you can reuse the existing cups if they're in good shape and just replace the spindle. Check out Sheldon Brown's article on this topic: http://sheldonbrown.com/gloss_bo-z.html#bottom
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Old 07-12-07, 12:32 AM   #10
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I've read that you can reuse the existing cups if they're in good shape and just replace the spindle. Check out Sheldon Brown's article on this topic: http://sheldonbrown.com/gloss_bo-z.html#bottom
Thanks. I took a look. It seems that if use the existing cups, then I need an Italian sized (70 mm) spindle which I'd have to find and then I need to get a couple of tools plus the new (probably used) cranks. Sounds like a fun project that would definitely remove some of the excess weight but since I haven't done it before I'm reluctant to take it on right now. My wife is doing her first Triathlon in a couple of weeks and is using this bike.

It would be great to lighten it up a bit, but she needs it to train too, so it can't be out of comission too long. If she wants to do another one and use this bike again (she might want something better), I might take it on then.
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