Looking for seat post options : French '70s 2
01-23-21, 09:14 PM
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Looking for seat post options : French '70s 2
I inherited an old Champion Du Monde from the early 70's
good condition but with a seat post of 24.6-9, call it 25mm that is only 5"
Sheldon's French pages not much help, unfortunately
22" frame is OK for me but seat a good 4" too low f
Not sure what to do with it.
weld on an extension ? Sell to shorter rider?
good condition but with a seat post of 24.6-9, call it 25mm that is only 5"
Sheldon's French pages not much help, unfortunately
22" frame is OK for me but seat a good 4" too low f
Not sure what to do with it.
weld on an extension ? Sell to shorter rider?
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01-23-21, 10:16 PM
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Found some Peugeot 25's on German ebay
Will chase some more in US
That or get a booster seat
Will chase some more in US
That or get a booster seat
01-23-21, 10:17 PM
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I inherited an old Champion Du Monde from the early 70's
good condition but with a seat post of 24.6-9, call it 25mm that is only 5"
Sheldon's French pages not much help, unfortunately
22" frame is OK for me but seat a good 4" too low f
Not sure what to do with it.
weld on an extension ? Sell to shorter rider?
good condition but with a seat post of 24.6-9, call it 25mm that is only 5"
Sheldon's French pages not much help, unfortunately
22" frame is OK for me but seat a good 4" too low f
Not sure what to do with it.
weld on an extension ? Sell to shorter rider?
We need pics or it didn't happen.
Clamp pinched, corroded or otherwise mangled?
It can be critical to suss any and all of these ?'s out to move forward.
01-23-21, 10:31 PM
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or like these
https://www.modernbike.com/sunlite-25.0-mm-seatposts
https://www.bikeinn.com/bike/ergotec-patent-cnc/137484637/p
https://www.modernbike.com/sunlite-25.0-mm-seatposts
https://www.bikeinn.com/bike/ergotec-patent-cnc/137484637/p
Last edited by Steel Charlie; 01-23-21 at 10:40 PM.
01-23-21, 11:01 PM
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...I don't get a good feeling from your rather casual mention of a seat post diameter of "24.6-9, call it 25".
If the post that is in there mow is a good fit, measure it with a caliper. If it is not a good fit, find someone to help you figure out what is a good fit.
If you can't measure a seat post within a tenth of a mm, one way or the other, you are not going to get a good result unless you get lucky by mistake.
...I don't get a good feeling from your rather casual mention of a seat post diameter of "24.6-9, call it 25".
If the post that is in there mow is a good fit, measure it with a caliper. If it is not a good fit, find someone to help you figure out what is a good fit.
If you can't measure a seat post within a tenth of a mm, one way or the other, you are not going to get a good result unless you get lucky by mistake.
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01-24-21, 12:37 PM
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I would wonder how many different post sizes were used in that model? Anyone here got one / had one? Sub-25mm seatpost are not all that common to my knowledge and 25mm seatposts are. Even my MS tubed Sannino uses a 25mm.
and then there is always the situation where the seatpost has been previously fitted with an incorrect size - Like the Bob Jackson I had that came with a 27.3 Campy post that must have required some REAL effort to install cos it took some REAL effort PLUS to get it out.
just sayin'
and then there is always the situation where the seatpost has been previously fitted with an incorrect size - Like the Bob Jackson I had that came with a 27.3 Campy post that must have required some REAL effort to install cos it took some REAL effort PLUS to get it out.
just sayin'
01-24-21, 02:13 PM
#8
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Many Peugeots also came with a seatpost shim/sleeve. Take the shim out and measure the lug/tube opening not the seatpost.
01-24-21, 07:07 PM
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3alarmer good call
I remeasured the post at several spots to look again for patterns in the variation, and it is not distorted,
but varies in that range and on a lot closer inspection goes up to 25.34
It's not ovalized and there is no corrosion, ? dents, variance, chroming ?
the socket is slotted not round, as is not unusual, 24.64 to 25.60mm.
My guess is that the post is "25mm", and since I originally just saw the smaller measurements and assumed they were the "real"diameter.
Not seeing that size on Sheldon's list should have been a tip off. 25mm's are to be had and should fit
Whew. came with a 5"post that gives a pedal to seat of 33" which is about 4.5" short of where I live.
Seems original, Bike , a Champion du Monde appears to have come from a small factory in Mulhouse during the bike boom of the early/mid '70's
Pleasant enough steel frame simplex/Mafac running gear , though geared for flat racing 50-48 x12-22 10 speed 25lbs
Good to recheck, also kept me from trying to use a 22.3 threaded to 25.3mm threadless stem extender inverted as a seat post,
which would have exposed me to scurrilous comment, no doubt.
I remeasured the post at several spots to look again for patterns in the variation, and it is not distorted,
but varies in that range and on a lot closer inspection goes up to 25.34
It's not ovalized and there is no corrosion, ? dents, variance, chroming ?
the socket is slotted not round, as is not unusual, 24.64 to 25.60mm.
My guess is that the post is "25mm", and since I originally just saw the smaller measurements and assumed they were the "real"diameter.
Not seeing that size on Sheldon's list should have been a tip off. 25mm's are to be had and should fit
Whew. came with a 5"post that gives a pedal to seat of 33" which is about 4.5" short of where I live.
Seems original, Bike , a Champion du Monde appears to have come from a small factory in Mulhouse during the bike boom of the early/mid '70's
Pleasant enough steel frame simplex/Mafac running gear , though geared for flat racing 50-48 x12-22 10 speed 25lbs
Good to recheck, also kept me from trying to use a 22.3 threaded to 25.3mm threadless stem extender inverted as a seat post,
which would have exposed me to scurrilous comment, no doubt.
