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Sheldon Brown's
Seatpost Size Database

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Spoke Divider

Spoke Divider

This page is a listing of various bicycles, and the seatpost diameters that fit them.

Sheldon Brown started this project and realizing that it was too large a project for one person, he solicited information from readers. John Allen and I are holding off on collecting more reader provided information in favor doing something we can calculate and check.

The size is usually stamped on the bottom of the seat post.

On a related topic, we (Sheldon Brown with updates by John Allen) have an article on Stuck Seatposts which may be of use to you.

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National and Historical Trends

Most steel bicycle frames have tubing of standard outside diameter. Frames made to British or Italian standards will typically have 1 1/8" (28.6 mm) seat tubes. Older French bicycles used 28 mm. Old American style, commonly used on BMX bicycles and other bicycles that use one-piece-cranks, uses a 1" seat tube. Standard outside diameter accommodates standard lugs and clamp-on parts such as front derailers, pulleys and other cable guides, pump pegs, etc.

High-performance bicycles are made of thinner-walled tubing, so the hole will be larger if the outside diameter is kept the same.

As a result, a larger seatpost size is often a sign of a higher-quality bicycle. This has resulted in a de facto standard of 27.2mm for high-quality bicycles that have 1 1/8" O.D. seat tubes. Since high-quality seatposts are widely available in 27.2, most high-end aluminum and carbon fiber road bicycles also use 27.2.

A recent trend to oversized tubing has resulted in the introduction of oversized seatposts (anything over 27.4 would be considered oversized.) These are more commonly seen on mountain bikes, where the longer seatposts can use the extra strength.

Diameter is not the only factor affecting compatibility. Using a carbon-fiber seatpost in a metal frame, or vice versa, invites problems. Metal should be greased, but carbon fiber should not be. The seatpost clamps of metal frames easily damage carbon-fiber seatposts.

Accuracy

Most of the size information on the list below was provided by people like you. We have no way to check the accuracy of the data. It should be noted that frames can be reamed out to take a larger-sized seatpost, and sometimes a replacement seatpost may be a slightly different size than the original.

Measuring is better than guessing. Most better bicycle shops will have a set of seatpost-sizing rods like this:

Seatpost Sizing Rod

Alternately, you could check the diameter of a seatpost that fits. The diameter is stamped on many seatposts (usually on the part that is fits inside the bicycle's seat tube and gets scratched up and covered with grease, *sigh*). You also could measure the diameter using a dial indicator caliper.

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Spoke Divider

Make Model Year Size Notes
A
3Rensho listed under "S" for "SanRensho"
Adams Trail-a-Bike Ultimate 1999 25.4
ALAN 1975-76 25.0
Amp B-3 1997 31.6
Apollo Prestige 1984 26.6
Atala Grand Prix 1968-69? 26.8 Nuovo Record
Austro-Daimler SL 1975? 25.4
Austro-Daimler Superleicht 1970s 27.2
Austro-Daimler Ultima 1970s 27.2
Austro-Daimler Vent Noir 1970s 27.2
B
Balance AL 350 1996 32
Barracuda Cuda Comp 1995 26.4
Batavus Competition 1985 27.0 531c
Bates (Horace) Cantiflex tubing All 26.8
Bates (E.G.) Pennine 27.2
Battaglin SL 1978 27.2
BMX bikes Better models 22.2 .875" (7/8")
BMX bikes Cheap models 21.15 .833" (nominally 13/16")
Bianchi Boardwalk 1993? 26.8
Bianchi Brava 1999 26.6
Bianchi Campione del Mondo 12V 1981 27.2
Bianchi Campione d'Italia 1995 27.2
Bianchi Cyclocross All 27.2
Bianchi Cromor 27.2
Bianchi Eros 1994 26.6 Lugged
Bianchi Eros 1997-99 27.2 TIG
Bianchi Giro 1987 27.7
Bianchi Giro 1999 26.8 Aluminum
Bianchi Limited 1982 27.2 Japan
Bianchi Lynx 1997 26.6
Bianchi Milano 26.6
Bianchi Nuovo Racing 1982 27.2
Bianchi Peregrine 1996 26.8
Bianchi Project 5 1990s 27.0
Bianchi Reparto Corsa 1994 27.2 Columbus SBX
Bianchi San Remo 1997-99 27.2
Bianchi Sport SX 1989 26.6 Ishiwata
Bianchi Strada 1996 26.6 (Hybrid)
Bianchi Super Grizzly 1990 26.6
Bianchi SuperBee 2001-02 28.6
Bianchi Superleggera 1981 27.2
Bianchi Trofeo 1984 27.2 Columbus SL/SP
Bianchi Trofeo 1996 27.2
Bianchi Volpe 1997-99 26.6
Green Gear/Bike Friday New World Tourist 1997 26.8
Green Gear/Bike Friday Pocket Rocket 1996 27.0
Bob Jackson see Jackson
Bontrager Race Lite 1994 26.8
Bottecchia Giro d'Italia 1972 27.2 Columbus
Bottecchia Gran Turismo 1972 27.2 Columbus
Bottecchia SL 1989 27.2
Bottecchia SL 1992 27.2
Boulder Gazelle 1991 28.6 1 1/8"
Bridgestone 400 1985-86 27.0
Bridgestone CB-1 1994 26.2
Bridgestone MB-1 1990-93 27.2
Bridgestone MB-2 1994 29.4
Bridgestone MB-3 1990-94 27.0 Tange
Bridgestone MB-4 1990 or '91 26.2
Bridgestone MB-5 1991 26.8
Bridgestone NB-26 1993 26.4
Bridgestone Radac 1991 25.8 Aluminum
Bridgestone RB-1/7 1993 27.0 Ishiwata
Bridgestone RB-2 1994 27.0 Ishiwata
Bridgestone XO-1 1992,'93 27.0
Burley Duet 1992 26.6
Burley Zydeco 1996 26.6
C
Caloi MTB 1996-98 27.0
Calfee Tetra Pro 1994 27.2
Campania 1973? 25.8 Japanese
Cannondale All All 27.2
Carbonframes Tetra Pro 1994 27.2
Capo 1960? 26.4 Austria
Carlton late '50s 27.0
Carlton Flyer circa 1968 27.2
Carrera Steel 27.2
Casati SLX 1994? 27.2
Casati Victory 1984 26.8
Chris Chance Road 26.8
Cinelli Genius 27.2
Cinelli Super Corsa 1963--1973 26.2
Cinelli Super Corsa 1963--1973 26.2
Cinelli Unica 27.2
Centurion 1.4.3 1995? 26.8
Centurion Accordo R.C. 1995 26.6
Centurion Cavaletto 1986 26.0
Centurion Elite RS 1984 27.0 Tange CrMo
Centurion Ironman 1993 27.0
Centurion Omega 1978 25.8
Centurion Super Le Mans 1977, 77 26.2
Ciöcc Designer 1984 27.2 Columbus SL
Ciöcc Mockba '80 1984 27.2
Co-Motion Co-Pilot 1998 26.8
Colnago Bititan 1997 28.0
Colnago Bititan Master 1996 27.2
Colnago Carbiturbo All 25.8
Colnago C40 All 28.0
Colnago Master Piu 1991? 27.2
Colnago Super (Pista) 1970's 27.0
Condor road 1980? 27.2
Condor Pendio 2000 27.2
Cove Handjob 2003 27.0
D
Dakar Team 1996 26.8
Dawes Audax 1997 27.2
Dawes Giro 500 1999 26.6
Dawes Super Galaxy Tandem 1989 27.0 Reynolds 531 tandem
Debernardi Road 1999 27.2 Thron OS
De Rosa SLX 1991-95 27.2
De Rosa Super Prestige 1982 27.2
Dean Colonel Ti 1996 27.2
Diamondback Apex 1999 27.0
Diamondback Apex SE 1992 27.0
Diamondback Crestview 1998 26.0
Diamondback Lakeside 1998 27.2
Diamondback Master TG 1995? 27.0
Diamondback Podium 1.0 1996 27.2
Diamondback Response 1997 27.2
Diamondback Sorrento 1997 26.4
Diamondback Sorrento 2002 27.2
Diamondback Sorrento Sport 1994 25.8
Diamondback Topanga MTB 1992 26.6
Diamondback/DBR WCF 6.1 1997 27.2
Diamant all race/touring 1961-89 24 East German
Dunelt 3 speeds All 25.4 1"
E
Eddy Merckx see Merckx
Electra Delivery 7 1996 26.4
Ellsworth Sub 22 2000 Most 27.2; also 30.6,30.9
Exxon Graftek (nee Line Seeker) G1 1975-1979 23.8
F
Faggin Race/Ultegra 1995 27.2
Fastab Miura 1978 27.2
Fat City (Chance) Fat Chance 1983 27.0
Fat City (Chance) Yo Eddy, Bro Eddy 29.4
Fat City (Chance) Wicked 1988 26.4
Felt F1 Road 1996 26.8 Easton
Fiorelle circa 1972 27.0
Fisher Aquila 2000 27.2
Fisher Big Sur 1998 27.2 Easton ProGram Al
Fisher Big Sur 2000 31.6
Fisher CR-7 1990-92? 31.6 Aluminum front triangle, bolted on chromoly rear.
Fisher Hoo Koo E Koo 1993 (94?) 28.6 1 1/8"
Fisher Hoo Koo E Koo 1997 27.2 True Temper Triple Butted
Fisher Hoo Koo E Koo 1999 27.2
Fisher Klunker 1997 26.6
Fisher Marlin 1996 26.6 CrMo Taiwan
Fisher Zebrano 1997 26.6
Fondriest Road 27.2
Fuji Club 1982? 26.6
Fuji Cross 1999 27.0
Fuji Finest 1973 26.4
Fuji Finest 1976 26.6 Criep Rider, Japan
Fuji League 1985 26.8
Fuji Monterey 1981? 27.0
Fuji Professional 1982 26.8
Fuji Roubaix 1997 26.8
Fuji Roubaix 2000 27.2
Fuji Sagres SP 1988? 25.8 Taiwan
Fuji SX-550 1996 26.6
Fuji Team 1997 26.6 (Spec'd for 26.8, owners say 26.6)
Fuji Touring Series 1997 26.8
Dave Moulton Fuso Mountain 27.2
Dave Moulton Fuso Road 27.2
G
Gary Fisher see Fisher
Georgena Terry see Terry
Giant AL1.75 1995 30.8
Giant Butte 26.6
Giant Cadex CFM3 1992 30.2
Giant Custom 1000 Trekking 1991 28.6
Giant Cypress 2001 27.2
Giant Cypress 2004 30.8
Giant Kronos 1996 26.6
Giant Terrago 1998 30.8 European model 6061 T6 Al
Giordana Spica 1990 27.2 Columbus TSX
Gios A-70 1999 27.2
Gitane Sprint 1983 26.4
Gitane Tour de France 1973 26.4
Girardengo circa 1967 26.0
Bruce Gordon Rock & Roll Tour 1996 26.8
Green Gear/Bike Friday New World Tourist 1997 26.8
Green Gear/Bike Friday Pocket Rocket 1996 27.0
Green Gear Tandem Two'sDay 1996 28.6
Criffen Vulcan 1999-2001 25.0
GT Avalanche 1999 27.2
GT Bravado 1997 26.8
GT Bravado LE 1994 27.2
GT Karakoram 1997 26.8
GT Lightning 1998 27.2
GT LTS-2000 1998 31.6 7005 Al Taiwan
GT Outpost 1991 26.2
GT Outpost 1994 26.8
GT Outpost 1999 27.2
GT Pantera 1997 27.2
GT STS 1000DS 31.6
GT Talera 1991? 26.8
GT Team LTS 1996 27.0
GT Tempest 1999 27.2
GT Timberline 1993? 26.4
GT Timberline 2000 26.0
GT Zaskar 1995 27.0
GT Zaskar LE 1996 27.0
Guerciotti Cyclocross 1997 27.2
Guerciotti SL late 1970's 27.2
Guerciotti Jet 1982 27.2
Gunnar all all 27.2
H
Habañero Ti Mtn. 1996 27.2
Haro Omega 1993? 26.2
Heron All 27.2
René Herse Touring mid '60s 26.8
Hetchins Keyhole? 1979-80? 27.2
Hetchins Magnum Opus 1995 27.0
Holdsworth Professional 1970 27.2
Holdsworth Special 1980,-93 27.2
Holdsworth Super Mistral 1970? 27.0
I
Ibis Alibi alu. mountain 1997-99 28.6
Ibis All steel models? 29.4
Ibis Cousin It tandem 1991 29.4
Ibis Cousin It tandem 1997 28.6
Ibis Mojo 1997-99 28.6 Steel frames
Ibis Spanky road 1997-99 27.2
Ibis Ti Mojo 1997 28.6 1 1/8"
Ibis Ti road 1996 28.6 1 1/8"
Independent Fabrications Mountain 29.4
Independent Fabrications Road/Cross/Touring 26.8
Intense Uzzi SL 1998,'99 31.6
Iron Horse Hollowpoint 2002 27.2
Iron Horse M-700R 1993 26.8
Iron Horse Warrior Comp 2004 30.4
Iron Horse Zebra Matrix "ancient" 25.8
J
Bob Jackson Special Tourer 1997 27.0
Bob Jackson Super Tourist 1976 27.2 531 tubing
Bob Jackson Supreme 1996 27.2 653
Jamis Dakar 1993 26.6 Steel
Jamis Dakota 2001 27.2 Steel
Jamis Dakota AL 1996 27.2
Jamis Eclipse 1998 26.8
Jamis Eureka 1998 27.2
Jericho early '90s 31.8
Jeunet Franche Compte early '70s 25.8 (22.0 with shim)
K
Kestrel All All 27.2
KHS Ærotrack 1999 26.8
KHS Montant Comp FZ 1996 26.8
KHS Pro FZ 1994 26.8
Klein Performance 1983 27.4
Klein Performance 1988 27.4
Klein Performance 1995 27.2
Klein Pulse Comp 1996 31.6
Klein Quantum 1989-90 27.4
Klein Quantum 2003 31.5
Klein Quantum II 1993 31.6
Koga Miyata See also Miyata
Koga Miyata Exerciser 1991 26.8
Koga Miyata Prologue 1991 26.8
Koga Miyata Road Gentleman 1992 26.8
Kona Bear Deluxe 2001 30.0
Kona Caldera 1998 27.0 Steel
Kona Cinder Cone 1995 26.6
Kona Cinder Cone 1998 27.0 Steel
Kona Explosif 1989 26.6
Kona Explosif 1995 27.2
Kona Explosif 1998 27.0 Steel
Kona Fire Mountain 1994 26.6
Kona Hahanna 1998 27.0 Steel
Kona Hei-Hei 1995-99 27.0
Kona Hot 1998 27.0 Steel
Kona Kiluea 1998 27.0 Steel
Kona King Kahuna 1998 27.0 Al
Kona King Kikapu 1998 27.0 Al
Kona Ku 1998 27.0 Al
Kona Lava Dome 1998 27.0 Steel
Kona Pahoehoe 1998 27.0 Al
Kona Manomano 1998 27.0 Al
Kona Mokomoko 1998 27.0 Al
Kona Stab 1998 29.6 Al
Kona Uhu 1998 27.0 Al
L
Leader Silhouette 1998 25.4
Lemond Tourmalet 2000 27.2
Litespeed Catalyst 1996 27.2
Litespeed Classic 1995 27.2
Litespeed Hiwasee 1996 27.2
Litespeed Mountain 1990 27.0
Litespeed Obed 1994-98 27.2
Look kg76 Hinault 1991 25.0
Lotus Supreme 1983 27.2

Spoke Divider

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Continued at http://sheldonbrown.com/seatpost-sizes-m-z.html...

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Sheldon was previously listing people who had contributed data points to this list, but doing so more than doubles the time it takes to enter data, so he stopped doing it, and we hope everybody will forgive us for discontinuing this.

Spoke Divider

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