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  1. #26
    Senior Member goldfinch's Avatar
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    I tried a used 2006 Dahon Jetstream XP today. Very light. Very nice. I have a question. The seat is the only thing I didn't like, but the seat doesn't have traditional rails, but more like a dual track with notches. The seatpost is a really nice, light carbon post. But it is pretty large in diameter. I don't know if it is a standard size, it wasn't marked. Any way to get a different seat on that bike without buying a new post? If not, are posts available? Or are these some kind of odd size.
    Last edited by goldfinch; 02-04-14 at 07:50 PM.
    Every living thing is a GMO.

  2. #27
    Senior Member bhkyte's Avatar
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    sound like you have the sdp beam saddle and post system. Its a nice lightweight system that allow alot of for and aft adjustment.
    There are other saddles for the system, and a converter can be purchased to enable you to use railed saddles.
    Dual drive Mezzo (GOLD), Dual Drive Mezzo with bullbars (black), White Brompton thingy with Dahon Androes stem and bull bars. Birdie (old sytle) 7 speed. Downtube NS8.

  3. #28
    Senior Member goldfinch's Avatar
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    Quote Originally Posted by bhkyte View Post
    sound like you have the sdp beam saddle and post system. Its a nice lightweight system that allow alot of for and aft adjustment.
    There are other saddles for the system, and a converter can be purchased to enable you to use railed saddles.
    Yes! That is what it is. SDG i beam post and saddle. I can't seem to find an adapter. But if I get the bike I might see if I can find a compatible saddle I like. I am not overly picky about saddles, but I didn't really like what was on this bike.
    Every living thing is a GMO.

  4. #29
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    Quote Originally Posted by goldfinch View Post
    Yes! That is what it is. SDG i beam post and saddle. I can't seem to find an adapter. But if I get the bike I might see if I can find a compatible saddle I like. I am not overly picky about saddles, but I didn't really like what was on this bike.
    There was no adapter for the SDG i-Beam system .. following year Dahon was using the Kore I-Beam system.. pretty much the same but you could get a Kore rail adapter (which wouldn't work on the SDG seatpost) .. so as to options, find an I-Beam system saddle that you like (Kore or SDG) and mount to the SDG I-Beam Carbon post, or buy a conventional rail seatpost for a Dahon or Tern (34mm diameter) and mount whatever saddle you want.. If it were a Kore seatpost, then the cheapest route would be to purchase a rail adapter for your favorite rail saddle.. FWIW, the SDG Bel-Air saddle is my preferred saddle and I have it on most of my bikes either rail or I-Beam..

  5. #30
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    I hear you I really do. I'm about the same height as you. I always say I'm 5 feet but I'm actually 1 centimeter shorter. On top of that, I also have a particularly short inseam (thanks a lot for that Dad!) I can only tell you about my experience with the Brompton. I had been looking for a bike that didn't represent a nightmare or a danger to ride , due to the frame being too large for me, resulting in having little control. When I learnt about the Bromptons I thought I had struck gold but was insecure about the very same things you mention. Would the reach be comfortable? Would the seatpost height get in the way of the folding? Would I even be able to adjust it to my small but somewhat chubby size? One day I plucked up the courage and went to a store to try one. First I rode an S-type. I wasn't crazy about it. I had to lean far too much for my comfort. I wanted a city bike that I could ride in an upright position. Then I tried an M handlebar and thought it was heavenly! I had finally, after years, and years of searching found MY bike. I started coming up with all sorts of pretexts... uh, I mean reasons, to buy one. "I live in a big conflictive city. It will save me from spending hours stuck in traffic jams. It's environmentally friendly, etc". I had to save for over two years to buy it and I just purchased one last week. Just then, I discovered the most important asset of this bike: it fits me. It really does. That makes the money I spent on this bike money very well spent. I thought it would be necessary to tilt the handlebar towards me to shorten the reach. To my surprise it wasn't! So far I'm ecstatic about it! The most comfortable bike I have ridden since I was 10 years old. I wouldn't hesitate in recommending it for any vertically challenged comrades out there. I suggest, if possible, trying one before you buy. I read somewhere that the S-type bar was more suited for short people but it wasn't my case. Good luck!
    Last edited by fresh17; 02-06-14 at 03:39 PM. Reason: spelling!

  6. #31
    Senior Member goldfinch's Avatar
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    OK, I am really interested in the Jetstream. It is comfortable. It folds easily. The price is reasonable. I think I can deal with the seat. But how do you carry things on it? I can't clamp my usual Klickfix adapters to the carbon seatpost or carbon handlebars.
    Every living thing is a GMO.

  7. #32
    Aspiring Fred
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    My wife is five feet tall with short legs. The M type Brompton fits her very well.

  8. #33
    Senior Member ThorUSA's Avatar
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    Quote Originally Posted by goldfinch View Post
    OK, I am really interested in the Jetstream. It is comfortable. It folds easily. The price is reasonable. I think I can deal with the seat. But how do you carry things on it? I can't clamp my usual Klickfix adapters to the carbon seatpost or carbon handlebars.
    if you found an ex Jetstream for a good price, its a winner...
    why doesnt the clickfix work on the carbon seatpost ? Or handlebars ? Carbon seatpost .. you sure about an SDG carbon seatpost ? I have regular ones and Kore and an sdg somewhere floating around, but none are carbon ...
    make us a pic and put it here from the underside of the saddle and clamp and we will know

    Best Thor
    Having fun selling Terns and Dahons for a living. My personal website is also my business website, same as my profile name, therefore no link given to follow forum rules.

  9. #34
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    A non-custom tikit may not solve your problems. A size-Small tikit is about the reach of a standard Brompton. Thus what is ordinarily a major Brompton minus (being a poor choice for tall people) is a major plus for you. I would first look into a Brompton before a tikit.

    Bike Friday can make custom bikes easily your size: but we're talking some serious money.

  10. #35
    Senior Member goldfinch's Avatar
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    Quote Originally Posted by ThorUSA View Post
    if you found an ex Jetstream for a good price, its a winner...
    why doesnt the clickfix work on the carbon seatpost ? Or handlebars ? Carbon seatpost .. you sure about an SDG carbon seatpost ? I have regular ones and Kore and an sdg somewhere floating around, but none are carbon ...
    make us a pic and put it here from the underside of the saddle and clamp and we will know

    Best Thor
    I am not sure it is carbon, the seller is checking. So you don't see an issue with using a Klickfix mount on carbon? I never carry much weight.

    It isn't the lovely ex Jetstream, it is the nine speed Jetstream XP.
    Last edited by goldfinch; 02-06-14 at 03:47 PM.
    Every living thing is a GMO.

  11. #36
    Senior Member ThorUSA's Avatar
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    Quote Originally Posted by goldfinch View Post
    I am not sure it is carbon, the seller is checking. So you don't see an issue with using a Klickfix mount on carbon? I never carry much weight.

    It isn't the lovely ex Jetstream, it is the nine speed Jetstream XP.
    nah don't worry if it is carbon.... a little weight is fine...
    I do have bel air saddles for the seatpost in case u need it... I also have a wonderful new ex .just if you want to spend a lot more money :-)
    its in the garage sale...
    but how much is th seller askin for the regular one. it might still be a deal
    Having fun selling Terns and Dahons for a living. My personal website is also my business website, same as my profile name, therefore no link given to follow forum rules.

  12. #37
    Senior Member goldfinch's Avatar
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    Quote Originally Posted by ThorUSA View Post
    nah don't worry if it is carbon.... a little weight is fine...
    I do have bel air saddles for the seatpost in case u need it... I also have a wonderful new ex .just if you want to spend a lot more money :-)
    its in the garage sale...
    but how much is th seller askin for the regular one. it might still be a deal
    Six hundred. I think I am going for it.
    Every living thing is a GMO.

  13. #38
    coprolite fietsbob's Avatar
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    probably about the Fuel bill to get between MN & AZ in that motor home, I'd guess ..

  14. #39
    Senior Member goldfinch's Avatar
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    Quote Originally Posted by fietsbob View Post
    probably about the Fuel bill to get between MN & AZ in that motor home, I'd guess ..
    Ha! I wish.
    Every living thing is a GMO.

  15. #40
    Senior Member goldfinch's Avatar
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    OK, I bought the bike. It rides beautifully and I love the extra light weight, I can easily carry it folded. As I mentioned the only thing I do not like is the seat. It just isn't my kind of seat shape. I am looking at other I beam seats but not really likely what i see. My two favorites seats are the Terry Butterfly and the Brooks Finese.

    So, I am looking to see what I might use as a replacement seatpost. I don't need a real long one. I prefer light weight. I don't need a suspension. I don't need an integrated seat pump. Where are the ordinary aluminum seatposts in the 33.9 size? Or do I need to buy Thor's extra long one and cut it down? I only have about 6 inches of post showing.
    Every living thing is a GMO.

  16. #41
    Senior Member smallwheeler's Avatar
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    Quote Originally Posted by goldfinch View Post
    OK, I bought the bike. It rides beautifully and I love the extra light weight, I can easily carry it folded. As I mentioned the only thing I do not like is the seat. It just isn't my kind of seat shape. I am looking at other I beam seats but not really likely what i see. My two favorites seats are the Terry Butterfly and the Brooks Finese.

    So, I am looking to see what I might use as a replacement seatpost. I don't need a real long one. I prefer light weight. I don't need a suspension. I don't need an integrated seat pump. Where are the ordinary aluminum seatposts in the 33.9 size? Or do I need to buy Thor's extra long one and cut it down? I only have about 6 inches of post showing.
    many options

  17. #42
    Senior Member goldfinch's Avatar
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    Quote Originally Posted by smallwheeler View Post
    Should have thought of eBay! I assume one aluminum is as good as another for a lightweight like me? Also, what do people think of those seat post and pump combinations? Heavy?
    Every living thing is a GMO.

  18. #43
    Senior Member goldfinch's Avatar
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    OK, I've tracked down seat posts so I am good with that modification.

    Even though I bought the Jetstream today I did a test ride of a Brompton over 10 miles. The Jetstream is considerably lighter, weighing in at well under 20 pounds. I liked the gearing and shifting on the Jetstream better. I liked the fit of the Brompton better. I am glad I bought the Jetstream but I have decided to try out some other modifications to improve the reach, which is more than the Brompton. I have a pair of Sparrow bars on another bike. I am going to try those to see what that might be like, even though it is a PITA to swap bars out and then put them back again. It would be nice to find something lighter than the Sparrows but I want to give it a try, partly to see how it folds.

    Another option is to get Thor's Aber Hallo stem, which would bring the bars closer to me. http://www.thorusa.com/dahon/technical/aberhallo.htm Anyone have experience using this product?
    Every living thing is a GMO.

  19. #44
    Senior Member ThorUSA's Avatar
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    thanks for the private message .. I cant answer it due to my less than 50 pints ... yeah ..
    anyhow
    get the long seatpost and cut it to length, it will be affordable and light as you cut half off . its a good seatpost and well worth the money ... and an aber hallo to move the handlebar back ...

    ( keep the other seatpost and seat, if you want to sell the bike or have somebody else ride it :-)

    Best Thor
    Having fun selling Terns and Dahons for a living. My personal website is also my business website, same as my profile name, therefore no link given to follow forum rules.

  20. #45
    Senior Member goldfinch's Avatar
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    Quote Originally Posted by ThorUSA View Post
    thanks for the private message .. I cant answer it due to my less than 50 pints ... yeah ..
    anyhow
    get the long seatpost and cut it to length, it will be affordable and light as you cut half off . its a good seatpost and well worth the money ... and an aber hallo to move the handlebar back ...

    ( keep the other seatpost and seat, if you want to sell the bike or have somebody else ride it :-)

    Best Thor
    Thanks Thor.
    Every living thing is a GMO.

  21. #46
    Senior Member ThorUSA's Avatar
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    Quote Originally Posted by smallwheeler View Post
    yeah..... but who wants :
    Quincunx draw-tube,More light,More strong

    :-) thor
    Having fun selling Terns and Dahons for a living. My personal website is also my business website, same as my profile name, therefore no link given to follow forum rules.

  22. #47
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    Well done goldfinch. Your perseverance has paid off.

    With a little bit of final dialing in the fit, you should be quite happy. Enjoy your new ride...

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