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View Poll Results: make of your cracked folding frame

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  • Dahon (specify model)

    5 41.67%
  • Downtube

    2 16.67%
  • Brompton

    3 25.00%
  • Bike Friday (specify model)

    1 8.33%
  • Xootr Swift (specify steel ot alu)

    1 8.33%
  • Birdy

    0 0%
  • other model (specify)

    0 0%
Multiple Choice Poll.
Results 1 to 14 of 14
  1. #1
    hipster traffic dodger ChiapasFixed's Avatar
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    folding bike frames crack tendency poll

    well folks, there has been some discussion and finger pointing lately around the issue of cracks appearing in the frames of certain folding bikes. because folders are subject to different kind of stresses sue to long seatposts, clamps, etc, they may be more prone to this kind of thing. In any case, it may be interesting for all sufferers of this kind of misfortune to tell us the make of their bike and any other useful info regarding frame cracks (repair possibilities, warranty coverage, etc.)
    So, what make was YOUR cracked bike?:
    IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey, UGADA Tikit

  2. #2
    Senior Member
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    For me it was a Dahon Vitesse. Cracked at seat tube joint. Didn't replace, stripped parts and recycled the frame.

  3. #3
    PDR
    PDR is offline
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    Not cracks in my case, but I had 2 Dahon MU SLís within the space of a year that both developed serious wear in the hinges. Both bikes where replaced under warrantee. Needless to say, I switched to Bromptons and Moultons (far better build quality) and would never buy a Dahon product ever again.

  4. #4
    Professional Fuss-Budget Bacciagalupe's Avatar
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    Collecting anecdotes from forum users is not going to give you any usable information about the quality of a manufacturer's frames.

    Unfortunately the only reliable figures would come from the manufacturers (and *possibly* a bike mechanic or retailer with a lot of business), who aren't likely to give you any hard numbers.

  5. #5
    New usename ThorUSA brakemeister's Avatar
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    lol

    with about 10 times more ( maybe more than that ) Dahons sold than all of the other combined this poll doesnt make any sense ......

    I am sorry
    thor

  6. #6
    Senior Member kamtsa's Avatar
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    100 years of bike development and we still have cracked frames and flat tires. We should do better than that.

    Kam

  7. #7
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    Quote Originally Posted by kamtsa View Post
    100 years of bike development and we still have cracked frames and flat tires. We should do better than that.

    Kam
    We can but people don't want a heavy bike.

    The alternative is very expensive light bikes and there's a very thin market at that end.

  8. #8
    hipster traffic dodger ChiapasFixed's Avatar
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    Quote Originally Posted by brakemeister View Post
    lol

    with about 10 times more ( maybe more than that ) Dahons sold than all of the other combined this poll doesnt make any sense ......

    I am sorry
    thor
    true, but some interesting info is already coming out! for example: i had never herd of xootr swifts cracking before! too bad the posted did not specify whether it was the steel or aluminum version...

    it is also useful for people to see that this is something that does happen, and to be able to relate to others' stories/experiences/solutions
    IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey, UGADA Tikit

  9. #9
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    Quote Originally Posted by ChiapasFixed View Post
    too bad the posted did not specify whether it was the steel or aluminum version...
    This was an issue with the earlier aluminum frames (seatube and chainstay cracked or split off, see the swift thread). Xootr has increased the tubing thickness on the newer frames. This increased the weight a bit, but I haven't seen or heard any complaints after this.

  10. #10
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    Quote Originally Posted by brakemeister View Post
    with about 10 times more ( maybe more than that ) Dahons sold than all of the other combined this poll doesnt make any sense ......
    Don't worry, I'm sure it'll get weighted into rates at the end, and we'll have a large enough sample to eliminate the noise. Yeah, that's it.

  11. #11
    Senior Member Foldable Two's Avatar
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    The only solution is solid frames and tires...plus an engine!

  12. #12
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    Quote Originally Posted by feijai View Post
    Don't worry, I'm sure it'll get weighted into rates at the end, and we'll have a large enough sample to eliminate the noise. Yeah, that's it.
    I hope so, because on the figures so far, Dahon and Brompton are equal. Seeing as about 100 times more Dahons are sold than Bromptons, that suggests on the current figures that a Brompton is 100 times more likely to crack!

    And Swifts are about 1,000 times more likely to crack than a Dahon.

    Relax fans, I don't actually think that is the case

  13. #13
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    Seat tube cracked on my '09 Downtube Mini. Horizontal crack radiating from stress relief hole at seat-post clamp area of seat tube. Its replacement is on the way (warranty).
    Internal Gear Hub Guru
    Currently owned hubs: Sachs Pentasport, SRAM P5 Drum, Sturmey SRF5-W , Sturmey XRD3
    Previously owned hubs: Shimano Nexus 8 speed, Sturmey AW 3 speed, Shimano 3 speed coaster, SRAM S7 Drum, Sturmey XRF8 8 speed
    Tested hubs: SRAM i-Motion 9 speed, Sturmey XRD5

  14. #14
    Bicycling Gnome
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    Merc. Frame cracked and failed at seat tube joint. Long steel seat tube always at max extension. 4000 miles of riding. about 3 years old.

    The failure was not catastrophic because there is a tough plastic insert inside the frame at this point. No accident would have happened without warning because the plastic insert holds everything together rather strongly. It took a persistent effort with tools to remove the plastic insert and cause the parts to separate.
    ďGet a bicycle. You will not regret it, if you live." - Mark Twain

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