1980's Peugeot bottom bracket needed but need guidance to select one!
Dave
from my brother who got it around 1982. It's a Peugeot Vittesses 12 spd (PH11
is on a sticker near the bottom bracket) with brazed butted tubing.
I upgraded parts on it back in 1987 when I was in college and outfitted it with
Suntour Cyclone cranks and chain rings, Shimano 600 rear derailleur, Suntour
Cyclone hubs and I think a Suntour Cyclone rear freewheel that is 7 spd. Rims
are Wolber Alpines. Good bike that has served me very well.
The bottom bracket has NEVER been serviced until tonight. I know nothing about
BB's until I came across Sheldon's web site and after measuring what I have, I
believe this bike has a standard ISO BB (it measures 68mm across the BB shell,
the fixed cup is left hand threaded). The spindle measures 123mm across which
matches the 123 stamped on the side. The spindle races are all torn up. Cups
look okay though (!?).
So I went to a couple of websites looking for a 68x123 BB (I'd love one with
sealed cartridge bearings) and found that I couldn't find one! Most of them
listed were much smaller than 123mm across. Some that looked close said UN-72 ?
What's that?
Then I got to thinking. Maybe I don't need a 123 mm spindle with the Suntour
cyclone cranks and the hubs I have. Then again, I can't shift to my bigger
front chainring while I'm in my smallest gear in the back without throwing the
chain off so maybe I do.
Can anyone offer me some guidance of what I should do? Does the Suntour Cylone
cranks need a 123 mm spindle? I know the left crank was damn near flush with
the bottom bracket adjustment nut so I don't think I can go much shorter, unless
they only get shorter on the chainring side.
Thanks for any assistance.
Dave
Qui si parla Campagnolo
<< I
believe this bike has a standard ISO BB (it measures 68mm across the BB shell,
the fixed cup is left hand threaded). >>
Do the cups say 1.37x24 on them?
Then get a un-72 that is english threaded and 68 by 122.5mm-should work-
Un-72s come in a variety of widths, 122.5, 127.5, 113, 115, 107. 110, etc-a
good LBS can help ya-
Peter Chisholm
"Vecchio's" Bicicletteria
1833 Pearl ST.
Boulder, CO
(303)440-3535
http://www.vecchios.com
Dave
indeed my Peugeot has a French thread bottom bracket, of course after
ordering a UN72 68,
1.375" and 35mm sure are damn close to each other (as is 1mm pitch vs
24 TPI threading). The left hand threaded cup on the chainring side
also made me think it was ISO thread.
Any chance I can still use the UN72 BB on my French 35mm x 1mm pitch
shell?
Dave
On 20 Feb 2001 13:59:35 GMT, vecc...@aol.com (Qui si parla
Sheldon Brown
>
> Bummer, now that I've really scrutinized the components, I find that
> indeed my Peugeot has a French thread bottom bracket, of course after
> ordering a UN72 68,
>
> 1.375" and 35mm sure are damn close to each other (as is 1mm pitch vs
> 24 TPI threading). The left hand threaded cup on the chainring side
> also made me think it was ISO thread.
If the fixed (right side) cup has a left thread, 35 mm, the bike is
Swiss threaded, not French. The diameter and pitch are the same, only
the thread direction on the fixed cup differs.
> Any chance I can still use the UN72 BB on my French 35mm x 1mm pitch
> shell?
No, not with the ISO mounting rings. You should be able to get it to
work with Phil Wood Swiss thread retaining rings. We stock these, see:
http://sheldonbrown.com/harris/drive.html#bottom
Are the present cups well and truly trashed? Usually spindles wear out
way before cups do.
I can also supply traditional cup-and-cone parts, see:
http://sheldonbrown.com/harris/french-cranks.html#bottom
Sheldon "Helvetia" Brown
+-----------------------------------------+
| Bicycling isn't supposed to hurt! See: |
| http://sheldonbrown.com/pain.html |
+-----------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772, 617-244-1040 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com
Dave
fixed cup. The weird thing is using my Mitutoyo digital calipers, the outer
diameter of the thread portion of the cups themselves measure 1.370", but when I
measure the thread pitch, it is 1mm (I used a 10-24 machine screw to compare the
thread pitch with the hopes that it would line up - it didn't). Measuring the
distance across ten threads came out to 10mm, or 1mm pitch.
The cups still look really good even after all these years and given what the
spindle looked like. I was hoping to be able to put in a sealed cartridge
bottom bracket after having my Suntour Cyclone sealed hubs work so flawlessly
all these years without any needed maintenance, but it also seems a shame to be
able to buy a UN72 for $20 but needing to buy retaining rings to make it work
for another $48!
I'll give you a call tomorrow and order some 1/4" balls and a new spindle. When
I get the UN72 in I'll take a look and see if I can modify it to fit. Looks
like I may have found a new project to build on my lathe.
Dave
On Wed, 21 Feb 2001 05:31:02 GMT, Sheldon Brown <Capt...@sheldonbrown.com>
wrote:
Tom Kunich
news:3a931c4e....@beta-west.newscene.com...
>
> Any chance I can still use the UN72 BB on my French 35mm x 1mm pitch
> shell?
No chance at all unless you want to strip the threads out.
French BB's are still available from several sources such as Quality Bicycle
Parts (meaning your local bike shop).
Sheldon Brown
> The cups still look really good even after all these years and given what the
> spindle looked like. I was hoping to be able to put in a sealed cartridge
> bottom bracket after having my Suntour Cyclone sealed hubs work so flawlessly
> all these years without any needed maintenance, but it also seems a shame to be
> able to buy a UN72 for $20 but needing to buy retaining rings to make it work
> for another $48!
UN72 bottom brackets are made by the hundreds of thousands by robots in Japan.
Phil Wood Swiss-thread mounting rings are made one at a time by
machinists in California.
> I'll give you a call tomorrow and order some 1/4" balls and a new spindle. When
> I get the UN72 in I'll take a look and see if I can modify it to fit. Looks
> like I may have found a new project to build on my lathe.
Good luck! You'll need more than a lathe to make the splines.
Note that older French BB cups often had thinner walls than newer
Japanese ones, so the distance between the bearing ridges on the spindle
can be different. When using Japanese spindles with French cups, one
often needs to use a 5** (intended for 70 mm shells) spindle rather than
the 3** spindle you'd normally expect for a 68 mm shell.
Measure the distance betwixt the bearing ridges on the existing axle
before you call with your order.
Sheldon "Multinational" Brown
+--------------------------------------------------------+
| The ultimate measure of a man is not where he stands |
| in moments of comfort and convenience, but where |
| he stands at times of challenge and controversy. |
| --Martin Luther King, Jr. |
+--------------------------------------------------------+
Sheldon Brown
> French BB's are still available from several sources such as Quality Bicycle
> Parts (meaning your local bike shop).
I guess you're still using your 1999 catalogue...QBP no longer lists
French BB cups.
This has become a specialty item, mainly available from--ahem--Harris Cyclery.
Sheldon "http://sheldonbrown.com/harris/french.html" Brown
+------------------------------------+
| France, France...if not for you, |
| the world would be alone! |
| --Victor Hugo |
+------------------------------------+
Dave
rotary table. The wife will appreciate seeing me actually using these
large machines that have been taking up much space in the garage.
Thanks for the heads up on measuring the distance between the bearing
ridges. I would have just blindly called and bought a 68x123 spindle.
Of course I left the spindle at home so I won't be able to measure it
until I get off work tonight.