What frames use(d) a 25.0mm seatpost?
#1
Senior Member
Thread Starter
Join Date: Feb 2020
Posts: 2,820
Mentioned: 49 Post(s)
Tagged: 0 Thread(s)
Quoted: 1106 Post(s)
Likes: 0
Liked 1,328 Times
in
784 Posts
What frames use(d) a 25.0mm seatpost?
Just picked up a Zeus 25mm post, single-bolt, no flutes, nicely made, made me think:
What bikes or frames of quality would use this size?
What bikes or frames of quality would use this size?
#2
Senior Member
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 5,380
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 2487 Post(s)
Liked 2,956 Times
in
1,679 Posts
Likes For Trakhak:
#3
Edumacator
Join Date: Jan 2018
Location: Goose Creek, SC
Posts: 6,820
Bikes: '87 Crestdale, '87 Basso Gap, '92 Rossin Performance EL-OS, 1990 VanTuyl, 1980s Losa, 1985 Trek 670, 1982 AD SLE, 1987 PX10, etc...
Mentioned: 59 Post(s)
Tagged: 0 Thread(s)
Quoted: 2440 Post(s)
Liked 3,135 Times
in
1,974 Posts
Early carbon fiber frames in addition to those mentioned above, maybe?
__________________
1987 Crest Cannondale, 1987 Basso Gap, 1992 Rossin Performance EL, 1990ish Van Tuyl, 1985 Trek 670, 1982 AD SLE, 2003 Pinarello Surprise, 1990ish MBK Atlantique, 1987 Peugeot Competition, 1987 Nishiki Tri-A, 1981 Faggin, 1996 Cannondale M500, 1984 Mercian, 1982 AD SuperLeicht, 1985 Massi (model unknown), 1988 Daccordi Griffe , 1989 Fauxsin MTB, 1981 Ciocc Mockba, 1992 Bianchi Giro, 1977 Colnago Super
1987 Crest Cannondale, 1987 Basso Gap, 1992 Rossin Performance EL, 1990ish Van Tuyl, 1985 Trek 670, 1982 AD SLE, 2003 Pinarello Surprise, 1990ish MBK Atlantique, 1987 Peugeot Competition, 1987 Nishiki Tri-A, 1981 Faggin, 1996 Cannondale M500, 1984 Mercian, 1982 AD SuperLeicht, 1985 Massi (model unknown), 1988 Daccordi Griffe , 1989 Fauxsin MTB, 1981 Ciocc Mockba, 1992 Bianchi Giro, 1977 Colnago Super
Likes For jdawginsc:
#5
Cat 6
Join Date: Dec 2007
Location: Mountain Brook, AL
Posts: 7,482
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 500 Post(s)
Liked 183 Times
in
118 Posts
Also some bike-boom entry-level racers from France, like my c72 Gitane Interclub.
I'll let you discern the "quality" level.
.
I'll let you discern the "quality" level.
.
__________________
72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff
72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff
Likes For Ex Pres:
#6
Senior Member
Join Date: Feb 2013
Location: Alta California
Posts: 14,271
Mentioned: 415 Post(s)
Tagged: 1 Thread(s)
Quoted: 3814 Post(s)
Liked 3,345 Times
in
2,182 Posts
-----
there were both french & italian base model road machines which employed a size of 25.0mm but that does not really answer your question since you are asking about quality
will be interesting to follow along...
-----
there were both french & italian base model road machines which employed a size of 25.0mm but that does not really answer your question since you are asking about quality
will be interesting to follow along...
-----
#7
Junior Member
Join Date: Dec 2020
Location: Estonia
Posts: 142
Bikes: HVZ Meteor 1979, HVZ Champion 1962, HVZ SS Moskva80 1981, Dürkopp 1936
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Liked 350 Times
in
70 Posts
Majority of bikes made in the USSR use a 25mm seatpost. HVZ Start Shosse road bike and its track/older versions also use a 25mm seatpost. Even the early high end soviet stuff used 25mm unless they used imported tubing, eventually they moved to 26.2mm.
#8
Port
Join Date: Jan 2008
Location: Boston
Posts: 6,656
Bikes: 2022 Soma Fog Cutter, 2021 Calfee Draqonfly 44, 1984 Peter Mooney, 2017 Soma Stanyan, 1990 Fuji Ace, 1990 Bridgestone RB-1, 1995 Independent Fabrications Track, 2003 Calfee Dragonfly Pro
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 986 Post(s)
Liked 1,870 Times
in
1,065 Posts
Bikes that used Columbus MS tubing, like Basso Ascot, Tommasini Diamante etc. had 25.0 posts.
__________________
https://rowdml.tripod.com/panmass
https://rowdml.tripod.com/panmass
Likes For Rocket-Sauce:
#9
Senior Member
Join Date: Jan 2004
Location: Madison, WI USA
Posts: 6,157
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
Quoted: 2364 Post(s)
Liked 1,751 Times
in
1,193 Posts
1988 Centurion Ironman Carbon and 1989 Centurion Carbon-R.
(FWIW, on the subject of bike-boom French bikes, my 1980 Peugeot UO-8 internally brazed Carbolite 103 has a 24.0 seat post.)
(FWIW, on the subject of bike-boom French bikes, my 1980 Peugeot UO-8 internally brazed Carbolite 103 has a 24.0 seat post.)
Last edited by madpogue; 12-14-23 at 11:10 AM.
#10
Senior Member
Join Date: Nov 2003
Location: Soviet of Oregon or Pensacola FL
Posts: 5,342
Bikes: Still have a few left!
Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 467 Post(s)
Liked 532 Times
in
267 Posts
my Vitus 979 has a 25.0 seat post
and the Zeus might, but unable to measure as its 3000 miles away in Oregon. Don
and the Zeus might, but unable to measure as its 3000 miles away in Oregon. Don
Last edited by ollo_ollo; 12-14-23 at 10:27 AM. Reason: add another pic
Likes For ollo_ollo:
#11
Edumacator
Join Date: Jan 2018
Location: Goose Creek, SC
Posts: 6,820
Bikes: '87 Crestdale, '87 Basso Gap, '92 Rossin Performance EL-OS, 1990 VanTuyl, 1980s Losa, 1985 Trek 670, 1982 AD SLE, 1987 PX10, etc...
Mentioned: 59 Post(s)
Tagged: 0 Thread(s)
Quoted: 2440 Post(s)
Liked 3,135 Times
in
1,974 Posts
Was Zeus perhaps a decent quantity supplier for top end Soviet era bikes? That would make sense in light of @geeteeiii report above...
__________________
1987 Crest Cannondale, 1987 Basso Gap, 1992 Rossin Performance EL, 1990ish Van Tuyl, 1985 Trek 670, 1982 AD SLE, 2003 Pinarello Surprise, 1990ish MBK Atlantique, 1987 Peugeot Competition, 1987 Nishiki Tri-A, 1981 Faggin, 1996 Cannondale M500, 1984 Mercian, 1982 AD SuperLeicht, 1985 Massi (model unknown), 1988 Daccordi Griffe , 1989 Fauxsin MTB, 1981 Ciocc Mockba, 1992 Bianchi Giro, 1977 Colnago Super
1987 Crest Cannondale, 1987 Basso Gap, 1992 Rossin Performance EL, 1990ish Van Tuyl, 1985 Trek 670, 1982 AD SLE, 2003 Pinarello Surprise, 1990ish MBK Atlantique, 1987 Peugeot Competition, 1987 Nishiki Tri-A, 1981 Faggin, 1996 Cannondale M500, 1984 Mercian, 1982 AD SuperLeicht, 1985 Massi (model unknown), 1988 Daccordi Griffe , 1989 Fauxsin MTB, 1981 Ciocc Mockba, 1992 Bianchi Giro, 1977 Colnago Super
#12
Junior Member
Join Date: Dec 2020
Location: Estonia
Posts: 142
Bikes: HVZ Meteor 1979, HVZ Champion 1962, HVZ SS Moskva80 1981, Dürkopp 1936
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Liked 350 Times
in
70 Posts
Was Zeus perhaps a decent quantity supplier for top end Soviet era bikes? That would make sense in light of @geeteeiii report above...
#13
Senior Member
Join Date: Mar 2007
Location: SF Bay Area, East bay
Posts: 7,663
Bikes: Miyata 618 GT, Marinoni, Kestral 200 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Mondia Special, Univega Alpina, Miyata team Ti, Santa Cruz Highball
Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 1612 Post(s)
Liked 2,594 Times
in
1,225 Posts
My 93' Miyata Team Titanium uses 25.
#16
Senior Member
Join Date: Nov 2003
Location: Soviet of Oregon or Pensacola FL
Posts: 5,342
Bikes: Still have a few left!
Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 467 Post(s)
Liked 532 Times
in
267 Posts
#17
Senior Member
Join Date: Jan 2019
Location: Netherlands
Posts: 669
Bikes: Especialy Alan, but also Empella, Cascarsi, Gazelle, Bianchi, CJV, Sirocco, Berkers etcetera
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 188 Post(s)
Liked 997 Times
in
355 Posts
Since 1972 Alan, Vitus, TVT, Stronglight Altec, Look. All mostly quality frames.
Likes For fabiofarelli:
#18
Senior Member
Late 80’s Jamis earth cruisers had that SP diameter. Some other would be General cruisers.
#19
Senior Member
this aluminum-framed 3Rensho pursuit bike I restored, made for 3Rensho by Yamakuni, uses a 25mm seatpost:
__________________
Check out www.djcatnap.com for articles on vintage Japanese & French bicycle restorations, components and history.
Check out www.djcatnap.com for articles on vintage Japanese & French bicycle restorations, components and history.
Likes For Catnap:
#20
Full Member
Join Date: Dec 2003
Location: San Francisco East Bay
Posts: 247
Bikes: 2016 Tom Kellogg steel Spectrum all-road, '89 Eisentraut Rainbow Traut, '81 Marinoni Special, 2018 Ritchey Road Logic, 2006 Ritchey Breakaway Cross, 2009 custom Joe Wells alu Tsunami CX, '71 Favorit (Czech Rep) Special, 2012 Co-Motion Tandem
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked 7 Times
in
6 Posts
One of my Favorits from Czechoslovakia, a lower quality mass-production model with straight gauge tubing uses a 25mm post. The other, a high end "F1 Special" model uses a 26.4 post, built by hand from imported tubing (probably 531).
Last edited by ZenNMotion; 12-15-23 at 04:45 PM.
Likes For ZenNMotion:
#21
Senior Member
Join Date: Jul 2014
Location: New Zealand
Posts: 1,035
Bikes: 1963? Anquetil , 1973 PX10,1979 PX10,1984 PX10, VITUS 979 PX10DU,1970S ALAN,1985 PSV10,1980s PY10FC,1978 bERTIN,ALAN carbon
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 283 Post(s)
Liked 636 Times
in
283 Posts
Incidentally I have been working on resurrecting a couple of damaged frames with 25mm seat posts
One is a black ALAN Record which has had a hard life . Came to me with a cracked and welded seatpost clamp ear.
I have a stash of ATAX quill seat posts and got a buddy to turn one down to 25mm for me .
The finish is really clean and tidy (machined one is top one in pic)
I have a Vitus somewhere in the cave too in a similar state .
All good fun !
Likes For 1simplexnut:
#23
Senior Member
Join Date: Jun 2010
Location: Medford MA
Posts: 2,089
Bikes: Ron Cooper touring, 1959 Jack Taylor 650b ladyback touring tandem, Vitus 979, Joe Bell painted Claud Butler Dalesman, Colin Laing curved tube tandem, heavily-Dilberted 1982 Trek 6xx, René Herse tandem
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 964 Post(s)
Liked 1,451 Times
in
723 Posts
Some early constructeur frames - Herse in particular - used 25.0 seatposts. The tubes came in whatever inner diameter they came in, and then the constructeur would braze in a sleeve to bring it to 25.0. I once did a sleeving operation like this to save a friend's Gunnar with a bunch of cracks in the seat cluster from a bungled removal of a stuck seatpost, but I think I sleeved it to 26.4 because of the greater availability of quality seatposts.
__________________
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
#24
Senior Member
Join Date: Nov 2005
Location: NW Ohio
Posts: 3,421
Bikes: 1984 Miyata 310, 1986 Schwinn Sierra, 2011 Jamis Quest, 1980 Peugeot TH8 Tandem, 1992 Performance Parabola, 1987 Ross Mt. Hood, 1988 Schwinn LeTour, 1988 Trek 400T, 1981 Fuji S12-S LTD, 197? FW Evans
Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 533 Post(s)
Liked 1,007 Times
in
516 Posts
That would be a really cool way to class up a Kabuki. It wouldn't do much to help out the nearly 9 pound frame weight, though.