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  1. #1
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    Thoughts on Kore I-Beam Seat post and Compatible Saddle?

    Anyone have an opinion on Kore's I-Beam seat post / saddle combination?

    I'm looking to have some weight-saving options for my Dahon Mu Uno for when I travel by train and will be putting the bike in overhead luggage racks, yet riding for short enough distances that I'm willing to forgo the seat-post pump that came with my Mu Uno.

    Two things give me pause:

    1) Would this really save much weight?

    The Biologic Postpump I have now is listed at 755 [g] on Thor's site, whereas the Kore I-Beam seat post is listed at 394 [g]. I can't find a weight for my saddle, but I figure even in the worst-case scenario an I-Beam compatible saddle wouldn't weigh any more. Accordingly, it seems like a lower bound on the weight savings should be 361 [g] (~0.8 lbs). Perhaps a light I-Beam saddle could bring this up to a total of close to a pound? Hmm... that best-case scenario might not be quite enough to justify the ~$100 expense...

    2) Would an I-Beam setup lower the maximum height at which I can position my saddle?

    I set my current saddle to right at the limit. Thor's site says the I-Beam post is 24" long with a 6" minimum insertion height. The Postpump is listed at only 23" long, but it doesn't specify a minimum insertion height. For comparison, however, I see that a standard Tern seat post is also only 23" long, but that it has a minimum insertion of only 4". If those numbers are the same for the Postpump, then I'd actually be an inch lower at maximum extension.


    Hmm... It seems that in thinking this through to write this post I've just about talked myself out of it. That said, I'll keep an open mind in case anyone has any strong opinions in favor.

  2. #2
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    Depends how heavy you are.
    The older SDG I beam seat post was even lighter and you can feel it flex a little whilst riding, perhaps the flex would reduce stress on the frame.
    The weight saving is significant, I think the standard post is way overbuilt for most people and the pump hardly ever of any use.

  3. #3
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    check this out. i had this on my dahon speed tr. it's superlight. http://www.aliexpress.com/store/prod...533223162.html

  4. #4
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    Quote Originally Posted by Derailed View Post
    Anyone have an opinion on Kore's I-Beam seat post / saddle combination?

    I'm looking to have some weight-saving options for my Dahon Mu Uno for when I travel by train and will be putting the bike in overhead luggage racks, yet riding for short enough distances that I'm willing to forgo the seat-post pump that came with my Mu Uno.

    Two things give me pause:

    1) Would this really save much weight?

    The Biologic Postpump I have now is listed at 755 [g] on Thor's site, whereas the Kore I-Beam seat post is listed at 394 [g]. I can't find a weight for my saddle, but I figure even in the worst-case scenario an I-Beam compatible saddle wouldn't weigh any more. Accordingly, it seems like a lower bound on the weight savings should be 361 [g] (~0.8 lbs). Perhaps a light I-Beam saddle could bring this up to a total of close to a pound? Hmm... that best-case scenario might not be quite enough to justify the ~$100 expense...

    2) Would an I-Beam setup lower the maximum height at which I can position my saddle?

    I set my current saddle to right at the limit. Thor's site says the I-Beam post is 24" long with a 6" minimum insertion height. The Postpump is listed at only 23" long, but it doesn't specify a minimum insertion height. For comparison, however, I see that a standard Tern seat post is also only 23" long, but that it has a minimum insertion of only 4". If those numbers are the same for the Postpump, then I'd actually be an inch lower at maximum extension.


    Hmm... It seems that in thinking this through to write this post I've just about talked myself out of it. That said, I'll keep an open mind in case anyone has any strong opinions in favor.
    I have the older version of the SDG I-Beam saddle that came from my Mu SL and is now on my Speed Duo and it works great. Should be the same as the new version? No? I really love the I-beam seatpost especially when it flexes. It does provide some suspension, a little less than my Thudbuster ST or more akin to a beam bike, on my 4130 chromoly Speed frame. Without it, it rides really harsh on chip sealed and potholes infested roads as I commute with my Duo everyday.

    With the new I-beam, they sell an adapter to convert the I-beam rail to take on regular saddles and it will put the saddle much higher than the stock I-beam saddle for a fee, but you may loose the flex that the I-beam saddle provides. This will probably be your best bet if you're facing minimum insert issues and the ability to use your own favorite saddle is a plus.
    Trek 5000 carbon road bike
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  5. #5
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    I'm curious about this myself. My Tern Duo came standard with a Biologic seatpost pump. Not only is it heavy but it doesn't even work. Even if it did work, I don't think I'd ever have the opportunity of using it. So I've been thinking about switching it with a lighter seatpost. But if the weight savings is less than a pound then I don't think it'd be worth the price/hassle.
    http://www.bikeforums.net/showthread...lo-from-Taipei!
    你好!
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  6. #6
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    The seat post that vmaniqui mentioned is often available new on ebay at a very good price. I'd go for that as you can use a standard saddle.

  7. #7
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    Quote Originally Posted by Taipei Tony View Post
    I'm curious about this myself. My Tern Duo came standard with a Biologic seatpost pump. Not only is it heavy but it doesn't even work. Even if it did work, I don't think I'd ever have the opportunity of using it. So I've been thinking about switching it with a lighter seatpost. But if the weight savings is less than a pound then I don't think it'd be worth the price/hassle.
    It doesn't work? Are you sure you're using it correctly? Oh, and by the way, these seatposts on Ebay seem to be lighter than those Kore ones - 50mm shorter, but 120 grams lighter. It's 481 grams lighter than the Biologic seatpost, so you're basically saving a pound. Worth it for $134 though? Hmmm...

    http://www.ebay.com/itm/TEAMSSX-New-...item43b2fb5279
    http://www.pedalroom.com/member/J-Dogg

  8. #8
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    A similar seat post has been selling on ebay.co.uk for around 20.

  9. #9
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    Quote Originally Posted by chagzuki View Post
    I'd go for that as you can use a standard saddle.
    I can see the attraction of using a standard saddle but, from what I understand, part of the weight savings of the KORE system is from the attachment mechanism for the non-standard saddle -- the system saddle, presumably, can weigh less because of less material needed for the rails.

    I just weighed my Postpump plus stock WTB / Dahon branded saddle, and I get 1.06 [kg]. If I use the Postpump weight from Thor of 755 [g], that would imply that my current traditional-rail saddle weighs 305 [g].

    I see an I-Beam saddle on Thor's site with a stated weight of 239 [g]; combined with the I-Beam post (394 [g]), that would put me at 633 [g], a predicted savings of 427 [g], or, almost a pound.

    I'm tempted...

    As always, thank you all for the responses!

  10. #10
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    On ebay UK at the moment there's a Kore seat post new for 15. Perhaps they'll ship to the US if you request it.

    The SDG seat post/saddle combo was ridiculously light, a shade under 600g according to my scales.

  11. #11
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    Quote Originally Posted by Training.Wheels View Post
    It doesn't work? Are you sure you're using it correctly? Oh, and by the way, these seatposts on Ebay seem to be lighter than those Kore ones - 50mm shorter, but 120 grams lighter. It's 481 grams lighter than the Biologic seatpost, so you're basically saving a pound. Worth it for $134 though? Hmmm...

    http://www.ebay.com/itm/TEAMSSX-New-...item43b2fb5279
    that doesn't seem right. i wouldn't touch it for that price. as what chagzuki mentioned, it sells on ebay for much less. i got mine for about $18.

  12. #12
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    Quote Originally Posted by Training.Wheels View Post
    It doesn't work? Are you sure you're using it correctly? Oh, and by the way, these seatposts on Ebay seem to be lighter than those Kore ones - 50mm shorter, but 120 grams lighter. It's 481 grams lighter than the Biologic seatpost, so you're basically saving a pound. Worth it for $134 though? Hmmm...

    http://www.ebay.com/itm/TEAMSSX-New-...item43b2fb5279
    Yea it doesn't work. When I first opened up the pump, the whole thing was filled with oil. Very strange, took me awhile to clean it out. When I pump it, I feel air coming out of the nozzle. But when I hook it up and pump, nothing happens, it only drains the tire. It seems like the pumped air is escaping before reaching the tire. Perhaps I'm doing it wrong but I don't see any way that's possible...

    For $18, I'll try a new seatpost, why not! But the problem is I'm in Taiwan. Are those seatposts available here?
    http://www.bikeforums.net/showthread...lo-from-Taipei!
    你好!
    Currently riding a Tern Verge Duo(PINK!)

  13. #13
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    http://www.bikeforums.net/showthread...lo-from-Taipei!
    你好!
    Currently riding a Tern Verge Duo(PINK!)

  14. #14
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    will not work. what you need is size 33.9mmx600mm. since you're in taiwan you've got access to all these accessories. this will work although it's in china. http://item.taobao.com/item.htm?id=1...0_3k4_62985785

    this is the pic of my $18 seatpost (gold color). size is 33.9mm x 600mm.
    Attached Images Attached Images
    Last edited by vmaniqui; 08-27-12 at 01:16 AM.

  15. #15
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    check this out on bay. they have a seatpost now: http://www.ebay.com/itm/2012-GUB-Sea...item51a1327cb9

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