Seat post - too short?
08-15-09 | 03:29 PM
#1
Thread Starter
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Joined: Jul 2009
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Seat post - too short?
I recently got a vintage 25.0 mm 3ttt seatpost for my Vitus frame. It's nice, but surprisingly short, with only about 6 cm enclosed in the seat tube when adjusted to optimum height. Is this enough?
08-15-09 | 05:56 PM
#3
Senior Member
Joined: Apr 2008
Posts: 2,638
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From: Maidstone, Kent, England
Bikes: 1970 Holdsworth Mistral, Vitus 979, Colnago Primavera, Corratec Hydracarbon, Massi MegaTeam, 1935 Claud Butler Super Velo, Carrera Virtuoso, Viner, 1953 Claud Butler Silver Jubilee, 1954 Holdsworth Typhoon, 1966 Claud Butler Olympic Road, 1982 Claud
My Vitus 979 came with an Ajax seat post that wouldn't go low enough for me. I cut 4cm off the bottom with a tube cutter and now it's perfect. Does anyone know why the seat post bottoms out on the seat tube like this? Is there some kind of step inside the frame?
08-15-09 | 06:09 PM
#4
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Joined: Dec 2005
Posts: 1,547
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From: Sunny Tampa, Florida
Depending on the bike, seat tubes do get reamed. Almost always on better bikes. Not always deeply enough to allow much adjustment range. Usually the reaming just cleans it up a bit, but it's enough to not get the post past that point.
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Still stupid and seriously neglected..
Still stupid and seriously neglected..
08-15-09 | 06:12 PM
#5
Senior Member
Joined: Apr 2008
Posts: 2,638
Likes: 14
From: Maidstone, Kent, England
Bikes: 1970 Holdsworth Mistral, Vitus 979, Colnago Primavera, Corratec Hydracarbon, Massi MegaTeam, 1935 Claud Butler Super Velo, Carrera Virtuoso, Viner, 1953 Claud Butler Silver Jubilee, 1954 Holdsworth Typhoon, 1966 Claud Butler Olympic Road, 1982 Claud
Thanks Ronsonic, that makes perfect sense. I worried because the part I removed was slightly tapered but it's been fine for 5 years now so must be seating OK in the seat tube.
