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Old 10-04-05, 06:04 PM   #1
halimec05
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!!!!!!!!!!!!!!!!!

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Old 10-04-05, 06:14 PM   #2
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Why not?
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Old 10-04-05, 06:43 PM   #3
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Originally Posted by halimec05
take 100mm off a 350mm aluminum post, why not?
Because the energy taken to cut it is more than the energy needed to ride with the extra weght for a year.

However, if you are compelled to do so, as long as enough seatpost remains to be inserted far enough into the seat tube, I know of no reason other than the above not to do so.

If I were to go to that much trouble, I would also take the time to etch a new minimum insertion line on the seat post (using the existing line to determine the proper depth). I would also round over the outside edge just a bit with sandpaper, a file or a Dremel tool.
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Old 10-04-05, 09:41 PM   #4
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What would you say is a minimum insertion for a seat post? I'm thinking of doing the same thing.
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Old 10-04-05, 09:56 PM   #5
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What would you say is a minimum insertion for a seat post? I'm thinking of doing the same thing.
Measure the min insert distance that the manufacturer has indicated on the uncut post first, and mark the same distance up on the post from where you intend to cut, before cutting the post.

Remember the seat tube also has a min insert requirement, usually not indicated. You should for example insert the post well past the intersection/lug/welds of the stays/top-tube/seat-tube.
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Old 10-05-05, 04:06 AM   #6
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I like to have at least a fistful of seatpost inserted.
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Old 10-05-05, 01:06 PM   #7
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If you're doing it for weight savings, you may be surprised how little the seatpost tube weighs. Most of the weight of a seatpost is in the clamp.

One reason not to do it is if you ever want to use the seatpost on a smaller frame, or sell the bike to a taller person. That's two.
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