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Juggler
 Post subject: Shorten seat post...?
PostPosted: Tue Oct 30, 2012 7:35 pm 
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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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prendrefeu
PostPosted: Tue Oct 30, 2012 7:39 pm 
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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
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Juggler
PostPosted: Tue Oct 30, 2012 7:43 pm 
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Thanks...

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

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Lig
PostPosted: Tue Oct 30, 2012 8:30 pm 
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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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Juggler
PostPosted: Tue Oct 30, 2012 8:39 pm 
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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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quattrings
PostPosted: Wed Oct 31, 2012 4:48 pm 
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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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Juggler
PostPosted: Thu Nov 01, 2012 3:25 pm 
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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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prendrefeu
PostPosted: Thu Nov 01, 2012 3:52 pm 
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Correct.

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Juggler
PostPosted: Thu Nov 01, 2012 4:28 pm 
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Thanks...

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