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Thread: Carbon fiber backrest release bar on my Tilite TR

  1. #11
    Senior Member wtf's Avatar
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    Great job!

  2. #12
    Quote Originally Posted by SCI_OTR View Post
    My titnanium release bar saved my bacon yesterday. I just lifted the frame out of my car and was holding it up by the release bar. As I reached down for one of my wheels, my hip gave out then went into a flexor withdrawl spasm. I went straight down. My front frame hit the concrete and the release bar took most of my weight. Fortunately, neither myself nor the frame had a single scratch. The TiShaft release bar bent ever so slightly but still functioned normally. I'm not sure carbon fiber would have held up as well.

    Excellent craftsmanship BTW.
    Hmm.. I think you should stick to the titanium one! I imagine CF, even made to be very strong, would crack instead of bend. It's a more brittle material.

  3. #13
    Quote Originally Posted by ChrissyOT View Post
    Hi!


    )

    . The original AL tube was 760 grams and the Carbon fiber tube+coupler nuts is 350.


    .)
    Simplement imposible, sheck your balance.

    http://www.smp.es/en/calcul

  4. #14
    Quote Originally Posted by totoL1 View Post
    Simplement imposible, sheck your balance.

    http://www.smp.es/en/calcul

    DUH TO ME. I wrote that post right before bed and...

    ...I forgot the decimal.

    76.0 grams vs 35.0 grams.

  5. #15
    Quote Originally Posted by ChrissyOT View Post
    DUH TO ME. I wrote that post right before bed and...

    ...I forgot the decimal.

    76.0 grams vs 35.0 grams.

    ok, that`s better

  6. #16
    Quote Originally Posted by ChrissyOT View Post
    ...I forgot the decimal.
    It's not like I didn't notice (after all I am a trained professional). I just assumed the you were using Imperial Grams.

    I will admit to having some difficulty getting used to my new metric watch (i.e. the whole 100 minutes in a metric hour concept).


  7. #17
    Senior Member lazierdog's Avatar
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    What's that piece of black stuff running across your axle bar shown just below the backrest release bar for? Looks like velcro or some kind of webbing.

  8. #18
    Quote Originally Posted by lazierdog View Post
    What's that piece of black stuff running across your axle bar shown just below the backrest release bar for? Looks like velcro or some kind of webbing.
    That would be a strap of the tension adjustable by straps seat upholstery.

    It looks like it is in an odd place because it is: My chair has lots of dump and so the standard vertical bar tilite uses for the seat-to-axle dimension isn't there, meaning the last velcro strap goes around the bracket securing the axle to the frame.



    (also here you can see the hub lock bracket and piston we made)

  9. #19
    Quote Originally Posted by ChrissyOT View Post
    I know what you mean about the crappy string - I used to have a Quickie Ti and I envied all of the Tilite users with their fancy-pants bars.

    You could easily do this mod if you your backrest release mechanism has two holes across from each other from which a bar could be attached.
    Wicked, might give it a go. Thanks Chrissy!
    "The problem with self improvement is knowing when to quit." "Diamond" David Lee Roth.

  10. #20
    Here are some how-to pics.

    The original aluminum:



    Weight of the AL bar:



    Weight of the Carbon bar without the threaded coupling nuts:



    I used the dremel tool to sand the edges, as the coupling nut didn't quite fit. The one on the right has a sanded edge.



    The nut in the end of the bar:



    Putting the second nut in the bar using putty:



    Done!


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