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  1. #1
    Senior Member
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    Dahon Helios P8 weird thunk\play

    I have a Dahon Helios P8 in brushed aluminum. Looks like this: http://tinyurl.com/6bxwlc
    The bike comes with 9 speed shifting via SRAM 3.0.

    On my recent rides I have been hearing a strange thunking sound which goes away when you stand on the pedal and not sit on the saddle. Sounds are not always easy to diagnose but does anyone have a guess what it might be?

    I have checked all the screws and everything seems tight and does not have any play when I shake with my hands.

  2. #2
    Senior Member what bike?'s Avatar
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    is the pedal hitting anything?, also check the gears and the seatpost, if it goes away when you stand up and pedal it must be something to do with the seatpost.

    also try pedaling standing up if it still does it then you can safely say it is not the seatpost

  3. #3
    Supreme Commander of CATO
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    Check your seatube for play. Also check the frame in that area for cracks.

  4. #4
    Senior Member
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    Thanks for the suggestion guys. Will check when I get home tonite.

  5. #5
    Senior Member what bike?'s Avatar
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    no problem

  6. #6
    jur
    jur is offline
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    Put a piece of paper or vinyl tape in the face of the rebar.

  7. #7
    New usename ThorUSA brakemeister's Avatar
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    jur got it

    tyvek ( export shipping envelop ) works best
    thor

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