Question about seatpost insertion length
08-06-17 | 02:05 AM
#1
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Joined: Aug 2014
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Question about seatpost insertion length
I'm building a bike and I bought a Charge Plug 5 steel frame:
The frame has a sloping top tube and the seat tube extends out a lot above the top tube. I have long legs for my height which means if I ride a bike that's comfortable in terms of length, I usually have to extend the seatpost a lot. That's the case here too. In terms of sizing the bike feels perfect, however there is an issue i'm a little bit worried about.
I have an FSA Afterburner seatpost that is 35cm long. I don't have the bike fully assembled yet but I set up the seat height.
With the correct seat height the seatpost is 14cm deep inside the seat tube measured from the top of the seat tube, and the seatpost extends around 7cm below the bottom of the top tube weld.
I'm used to longer seatposts and level top tubes, should I get a 40cm seatpost (+5cm) or is this perfectly fine? The bike will see a lot of rougher terrain but I only weigh around 70kgs. I know a new seatpost is not that much money, but it's still something and i've grown to like this one a lot.
The frame has a sloping top tube and the seat tube extends out a lot above the top tube. I have long legs for my height which means if I ride a bike that's comfortable in terms of length, I usually have to extend the seatpost a lot. That's the case here too. In terms of sizing the bike feels perfect, however there is an issue i'm a little bit worried about.
I have an FSA Afterburner seatpost that is 35cm long. I don't have the bike fully assembled yet but I set up the seat height.
With the correct seat height the seatpost is 14cm deep inside the seat tube measured from the top of the seat tube, and the seatpost extends around 7cm below the bottom of the top tube weld.
I'm used to longer seatposts and level top tubes, should I get a 40cm seatpost (+5cm) or is this perfectly fine? The bike will see a lot of rougher terrain but I only weigh around 70kgs. I know a new seatpost is not that much money, but it's still something and i've grown to like this one a lot.
Last edited by Facanh; 08-06-17 at 02:31 AM.
08-06-17 | 02:19 AM
#2
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Joined: Jun 2015
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From: Down Under
Bikes: A steel framed 26" off road tourer from a manufacturer who thinks they are cool. Giant Anthem. Trek 720 Multiroad pub bike. 10 kids bikes all under 20". Assorted waifs and unfinished projects.
I think that would be fine, the minimum insertion point is even level with the junction anyway!
08-06-17 | 08:22 AM
#4
Calamari Marionette Ph.D
Joined: Dec 2013
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From: Coeur d' Alene
Bikes: 3 Chinese Gas Pipe Nerdcycles and 2 Chicago Electroforged Boat Anchors
