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7 x 9 mm ovular seat post?

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7 x 9 mm ovular seat post?

Old 06-03-16, 04:42 AM
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7 x 9 mm ovular seat post?

I'm expecting "soon" to receive my carbon Selle Anatomica Kickstarter Special saddle, and just read it has oval saddle rails. Anyone found good seatposts suitable to this clamp design?
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Old 06-03-16, 05:12 AM
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Ovular seat posts tend to last only one season.
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Old 06-03-16, 06:31 AM
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Originally Posted by znomit View Post
Ovular seat posts tend to last only one season.
The Ritchie on my single is fine after 4 years. The Enves on our tandem are also working fine with no issues
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Old 06-03-16, 02:34 PM
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Thompson makes a clamp for their seatposts specifically designed for ovalized saddle rails.
I thought "ovular" had to do with ovulation. The term "ovular seatpost" really had me wondering.


-Tim-
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Old 06-04-16, 04:26 AM
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If the long axis of the oval is vertical, the 7X9 rails will fit properly in common clamps.
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Old 06-04-16, 04:42 AM
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Originally Posted by rpenmanparker View Post
If the long axis of the oval is vertical, the 7X9 rails will fit properly in common clamps.
Are there vertical and horizontal clamps?

I've got one of the Chinese CF saddles that seems to be held securely with a top & bottom clamp.

I might be more concerned with a clamp that was designed to grab the side of the rails, perhaps wrapping around them a bit. For example the old clamps for steel seatposts.
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Old 06-04-16, 04:48 AM
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Originally Posted by CliffordK View Post
Are there vertical and horizontal clamps?

I've got one of the Chinese CF saddles that seems to be held securely with a top & bottom clamp.

I might be more concerned with a clamp that was designed to grab the side of the rails, perhaps wrapping around them a bit. For example the old clamps for steel seatposts.
I believe there are a few side clamps. Those would not work with carbon rails. Carbon rails are ovalized with the long axis vertical in order to increase strength and stiffness against common vertical stresses. The side clamp posts would not fit the 9 mm part of the carbon clamps.
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Old 06-04-16, 06:19 AM
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Originally Posted by rpenmanparker View Post
... The side clamp posts would not fit the 9 mm part of the carbon clamps.
There are specific 7x9 clamp pieces available for most side clamp type posts to adapt them to common 7x9mm carbon rails.
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Old 06-04-16, 07:23 AM
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Originally Posted by TimothyH View Post
I thought "ovular" had to do with ovulation.

-Tim-
Correct. I guess the seatpost is grown from an egg, then hatches from the packaging, and then later mates in a 3-way with the frame and saddle.
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Old 06-05-16, 10:02 AM
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Originally Posted by znomit View Post
Ovular seat posts tend to last only one season.
Can you 'splain, please?
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Old 06-05-16, 04:15 PM
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Originally Posted by Road Fan View Post
Can you 'splain, please?
Because "ovular".

Geeze, tough crowd!
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Old 06-05-16, 04:38 PM
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Originally Posted by Road Fan View Post
Can you 'splain, please?

28 days, actually. Ask your parents.
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Old 06-05-16, 09:41 PM
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7mm X 9mm seatpost- very skinny,

sure to break.
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