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 Post subject: Shorten seat post...?
PostPosted: Tue Oct 30, 2012 7:35 pm 
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Joined: Thu Jul 26, 2012 8:34 am
Posts: 288
Location: Copenhagen, Denmark
Any rule of thumb on how much you can cut of the seat post, without compromising safety...? As in "how many cm's seat post is necessary in the seat tube?

Looking for more unnecessary grams to shave of the bike... :)

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PostPosted: Tue Oct 30, 2012 7:39 pm 
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Joined: Wed Oct 31, 2007 10:32 pm
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Location: Los Angeles / Glendale, California
General rule of thumb is that the seatpost needs to extend past the top-tube junction by 1 or 2 cm.

viewtopic.php?f=3&t=38112
viewtopic.php?f=3&t=90014

:thumbup:

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PostPosted: Tue Oct 30, 2012 7:43 pm 
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Joined: Thu Jul 26, 2012 8:34 am
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Location: Copenhagen, Denmark
Thanks...

And sorry for my lazyness (not using the search function) :)

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PostPosted: Tue Oct 30, 2012 8:30 pm 
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Joined: Sun Dec 19, 2010 3:57 pm
Posts: 257
Is there not a min mark on it? Just measure what this is to the end and then make sure you cut off leaving this amount. I think its usually around 10cm...


Lig.


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PostPosted: Tue Oct 30, 2012 8:39 pm 
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Joined: Thu Jul 26, 2012 8:34 am
Posts: 288
Location: Copenhagen, Denmark
Lig wrote:
Is there not a min mark on it? Just measure what this is to the end and then make sure you cut off leaving this amount. I think its usually around 10cm...


This must be the safe solution... I'll measure and see where that takes me.

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PostPosted: Wed Oct 31, 2012 4:48 pm 
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Joined: Sun Nov 14, 2010 10:25 pm
Posts: 479
actually Prendrefeu was right. Marking on the seatpost is there to indicate the strength of the seatpost, and you should also respect the mininum depth of the seatpost, but more importantly you should use the TT/ST as a reference to prevent frame damage.

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Last edited by Frankie - B on Thu Nov 01, 2012 7:01 am, edited 1 time in total.
deleted the quote.


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PostPosted: Thu Nov 01, 2012 3:25 pm 
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Location: Copenhagen, Denmark
quattrings wrote:
actually Prendrefeu was right. Marking on the seatpost is there to indicate the strength of the seatpost, and you should also respect the mininum depth of the seatpost, but more importantly you should use the TT/ST as a reference to prevent frame damage.


TT/ST = top tube/seat tube?

Meaning you agree that 1-2 cm below the point where the two tubes merge is the minimum seat post length?

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PostPosted: Thu Nov 01, 2012 3:52 pm 
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Location: Los Angeles / Glendale, California
Correct.

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PostPosted: Thu Nov 01, 2012 4:28 pm 
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Joined: Thu Jul 26, 2012 8:34 am
Posts: 288
Location: Copenhagen, Denmark
Thanks...

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