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  1. #1
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    Does Carbon Fiber tape around seatpost make it a Carbon Fibe seatpost?

    Hi I hae something creative in mind. Will wrapping around my alloy seatpost with several carbon fiber tape reduce vibration ?

    Will first of all I'm not sure if the purpose carbon fiber on bikes is to vibration and weight
    Last edited by Chansnewbike; 05-26-08 at 08:54 PM.

  2. #2
    Senior Member Joshua A.C. New's Avatar
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    Nope. Vibration will still be transmitted through the aluminum. The vibration dampening of carbon fiber composites comes from the way all of the materials deform together.

    Plus, you'll be changing the size of the seatpost and it won't fit in the seat tube anymore.
    Joshua A.C. Newman,
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  3. #3
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    As noted, you can't increase the diameter of your seatpost and still have it fit. If all you planned to do was wrap carbon tape around the exposed portion of the seatpost you will only change the cosmetics and have no other benefit.

  4. #4
    sch
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    The frequency of vibration dampening will be changed by adding weight to the seat post.
    CF is one way. Another would be filling the seat post with molten lead or a slug of depleted
    uranium for maximum effect. You seem to want more vibration ("reduce vibration dampening"
    as you phrased it) so a steel seat post might be a better idea. Steel vibrates a bit better
    than aluminum or CF.

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    Why would you suggest filling a seatpost with a toxic substance like lead? A solid steel rod would be just as effective, and less hazardous to one's health.

    I'm currently working on wrapping cardboard tubes from paper towel rolls with carbon fiber tape. Predicted weight for the full carbon frame is under 1.5 pounds.

  6. #6
    rebmeM roineS JanMM's Avatar
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    Quote Originally Posted by kramnnim View Post
    Why would you suggest filling a seatpost with a toxic substance like lead? A solid steel rod would be just as effective, and less hazardous to one's health.

    I'm currently working on wrapping cardboard tubes from paper towel rolls with carbon fiber tape. Predicted weight for the full carbon frame is under 1.5 pounds.
    Why not make the frame from glued-together PVC? Would weigh more than paper towel tube/cf tape but would be a lot easier to put together.

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    sch
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    CF is at least as hazardous as lead if you are cutting the tape to fit. The
    small shards of CF produced by the cutting are toxic to the lungs.
    The post was TIC, extrapolating on the consequences of the OP's approach.
    Otherwise an interesting approach to making a mandrel for a CF frame
    using paper towel rolls.

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    Senior Member Matt Gaunt's Avatar
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    Quote Originally Posted by sch View Post
    CF is at least as hazardous as lead if you are cutting the tape to fit. The
    small shards of CF produced by the cutting are toxic to the lungs.
    The post was TIC, extrapolating on the consequences of the OP's approach.
    Otherwise an interesting approach to making a mandrel for a CF frame
    using paper towel rolls.
    Are these still likely to explode catastrophically into a ball of flames without warning as with regular CF or does the paper towel roll core prevent this?
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  9. #9
    Elitist Troglodyte DMF's Avatar
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    Does painting your car Ferrari Red make it a Ferrari?


    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  10. #10
    Queen of France Indolent58's Avatar
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    Quote Originally Posted by DMF View Post
    Does painting your car Ferrari Red make it a Ferrari?


    Yes.

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    Quote Originally Posted by sch View Post
    The frequency of vibration dampening will be changed by adding weight to the seat post.
    CF is one way. Another would be filling the seat post with molten lead or a slug of depleted
    uranium for maximum effect. You seem to want more vibration ("reduce vibration dampening"
    as you phrased it) so a steel seat post might be a better idea.
    Steel vibrates a bit better
    than aluminum or CF.
    LOL sry I worded it wrong. Yes I want to reduce vibration NOT reduce vibration dampening. I will go back and edit

  12. #12
    Drops small screws noteon's Avatar
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    Quote Originally Posted by sch View Post
    CF is one way. Another would be filling the seat post with molten lead or a slug of depleted uranium for maximum effect.
    Margarine also works.

  13. #13
    Senior Member Bikedued's Avatar
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    As does buying a bike with a steel frame,,,,BD
    "Whale. Oil. Beef. Hooked!" The Rumjacks

  14. #14
    Elitist Troglodyte DMF's Avatar
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    Also a misconception. There are harsh steel bikes too. But I must admit I've never ridden one that had the jack-hammer-up-your-ass effect of some (rather expensive) aluminum frames.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

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    Quote Originally Posted by JanMM View Post
    Why not make the frame from glued-together PVC? Would weigh more than paper towel tube/cf tape but would be a lot easier to put together.

    It would be too hard to obtain the PVC elbows with correct angles... I'm not trying to built a chopper with a 45 degree head tube angle...

    A respirator will keep out the CF dust...

  16. #16
    Domestic Domestique UnsafeAlpine's Avatar
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    If you're looking to reduce vibration, for god's sake, don't remove the load bearing decals.

  17. #17
    rebmeM roineS JanMM's Avatar
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    Quote Originally Posted by kramnnim View Post
    It would be too hard to obtain the PVC elbows with correct angles... I'm not trying to built a chopper with a 45 degree head tube angle...

    A respirator will keep out the CF dust...
    How about flexible plastic electrical conduit? For that al dente spaghetti ride. Zero shock transmission.

  18. #18
    Senior Member Joshua A.C. New's Avatar
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    ... or how about a raw hot dog?
    Joshua A.C. Newman,
    Passionate lover of construction

  19. #19
    You Know!? For Kids! jsharr's Avatar
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    For those of you cutting the carbon fiber tape and paper towel rolls, please remember not to run with scissors and to keep the points down. If at all possible, use safety scissors with rounded points.
    Are you a registered member? Why not? Click here to register. It's free and only takes 27 seconds! Help out the forums, abide by our community guidelines.
    Quote Originally Posted by colorider View Post
    Phobias are for irrational fears. Fear of junk ripping badgers is perfectly rational. Those things are nasty.

  20. #20
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    Radial arm saw ftw.

  21. #21
    Senior Member Joshua A.C. New's Avatar
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    One time? at camp? Becky Frout had some carbon fiber? And she totally exploded.
    Joshua A.C. Newman,
    Passionate lover of construction

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