Can I heat carbon handlebars to alter angle on drops?

mrwibble
mrwibble Posts: 980
edited October 2013 in Workshop
bought some bars and one of the drops is out of symmetry, can I heat the bars to gently pull them in a tad?

Comments

  • marcusjb
    marcusjb Posts: 2,412
    mrwibble wrote:
    bought some bars and one of the drops is out of symmetry, can I heat the bars to gently pull them in a tad?

    Would you not be best served by taking them back to the place you bought them? They are faulty and need replacing by the dealer.
  • diamonddog
    diamonddog Posts: 3,426
    ^^This
  • Bozman
    Bozman Posts: 2,518
    After a shity, wet and windy ride this post has cheered me up no end. Absolute quality.
  • mrwibble
    mrwibble Posts: 980
    bought online from la la land
  • pinarellokid
    pinarellokid Posts: 1,208
    stunned. sits down with a bag of popcorn

    ok begin !!!!!
    Specialized S Works SL2 . Campagnolo Record 11spd. rolling on Campag Zonda wheels

    http://app.strava.com/athletes/881211
  • sungod
    sungod Posts: 17,356
    no, you can't heat them to correct the angle

    cf is bonded with epoxy, not thermoplastic
    my bike - faster than god's and twice as shiny
  • mrwibble
    mrwibble Posts: 980
    ok, i have learn a lesson, far east website. Burnt...
  • jibberjim
    jibberjim Posts: 2,810
    sungod wrote:
    cf is bonded with epoxy, not thermoplastic

    But epoxy does go more rubbery when you get it hot enough...
    Jibbering Sports Stuff: http://jibbering.com/sports/
  • sungod
    sungod Posts: 17,356
    jibberjim wrote:
    sungod wrote:
    cf is bonded with epoxy, not thermoplastic

    But epoxy does go more rubbery when you get it hot enough...

    yes, but...

    that's what happens when the epoxy is heated past its glass transition temperature

    whether the cf returns to its original strength after the experience is another matter

    especially without knowing Tg of the resin used and then being able to keep the temperature at the correct point throughout the area concerned while deforming it - too low and cracks could form, too high and the resin will be permanently degraded

    not something i'd risk on a safety critical component
    my bike - faster than god's and twice as shiny
  • You could always saw the drops off, paint Easton CT2 on it, and sell it on Ebay as a lightweight MTB straight bar....?
  • gozzy
    gozzy Posts: 640
    If you get them wet they'll melt a bit and you should be able to reshape them.
  • gethinceri
    gethinceri Posts: 1,663
    jibberjim wrote:
    sungod wrote:
    cf is bonded with epoxy, not thermoplastic

    But epoxy does go more rubbery when you get it hot enough...

    Surely they're already rubbery? They came from China.
  • mrwibble
    mrwibble Posts: 980
    Gethinceri wrote:
    jibberjim wrote:
    sungod wrote:
    cf is bonded with epoxy, not thermoplastic

    But epoxy does go more rubbery when you get it hot enough...

    Surely they're already rubbery? They came from China.

    ah thank you!
  • russyh
    russyh Posts: 1,375
    Just do it but please make sure you post a video for us all
  • kajjal
    kajjal Posts: 3,380
    sungod wrote:
    jibberjim wrote:
    sungod wrote:
    cf is bonded with epoxy, not thermoplastic

    But epoxy does go more rubbery when you get it hot enough...

    yes, but...

    that's what happens when the epoxy is heated past its glass transition temperature

    whether the cf returns to its original strength after the experience is another matter

    especially without knowing Tg of the resin used and then being able to keep the temperature at the correct point throughout the area concerned while deforming it - too low and cracks could form, too high and the resin will be permanently degraded

    not something i'd risk on a safety critical component

    Follow this advice and put it down to experience. Stuff from China , direct is cheap for a reason poor or no quality control and extremely cheap / nasty construction. I wouldn't go near it on a bike.
  • maddog 2
    maddog 2 Posts: 8,114
    brilliant
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
  • ovi
    ovi Posts: 396
    You could cut the bars in half at the centre of the clamp area and gently tighten the 4 clamp bolts on the stem just enough so you could still twist the bars with a little bit of force until both ends of the drops are aligned up. Then tighten the 4 bolts so each end of the bar is clamped by 2 of the 4 bolts.
    For a bit of extra strength you could insert some iron pipe.
  • mattsccm
    mattsccm Posts: 409
    Insert iron pipe.
    You must be ***ing joking.




    Bamboo please
  • plowmar
    plowmar Posts: 1,032
    Seriously, but did like the ongoing wet joke, how did you pay for them, is charge back an option?
  • wardieboy
    wardieboy Posts: 230
    I would stick with the bars but alter your saddle and cleats to point to the side of the bar which is out of alignment, it will take about four rides to get used to the position but after that you should be OK.

    Of course, you may want to realign your front wheel, so that it is also off centre so that you avoid banging your knee on the top tube when climbing out of the saddle.
  • pinno
    pinno Posts: 52,329
    Please please show us some pics of the things.

    How about putting them in a vice and bending them about a bit?
    Could they fit in a microwave?
    seanoconn - gruagach craic!
  • chris_bass
    chris_bass Posts: 4,913
    mrwibble wrote:
    bought online from la la land

    And I thought UKIP members would only buy British?
    www.conjunctivitis.com - a site for sore eyes
  • mrwibble
    mrwibble Posts: 980
    visually it messes with my OCD but when holding them you cannot tell and its impossible to get a good pic
  • napoleond
    napoleond Posts: 5,992
    mrwibble wrote:
    visually it messes with my OCD but when holding them you cannot tell and its impossible to get a good pic

    Get Team47b's mrs to do it, she takes a cracking pic ;)
    Insta: ATEnduranceCoaching
    ABCC Cycling Coach
  • Yellow Peril
    Yellow Peril Posts: 4,466
    pick a weekend where you can eat a copious amount. Avoid going for a crap for at least 36 hours then when you can hold it no longer extrude as bigger turd as you can (remember no crimping now!) and then shape it into a set of replacement bars.

    That's the closest you'll come to replicating the original manufacturing process of your faulty bars.
    @JaunePeril

    Winner of the Bike Radar Pro Race Wiggins Hour Prediction Competition
  • Maybe its your arms then. If you rub your elbow in just the right manner, you can shorten your arm slightly, up to about an inch. I remember me grandad showing me that trick as a child.
  • team47b
    team47b Posts: 6,425
    NapoleonD wrote:
    mrwibble wrote:
    visually it messes with my OCD but when holding them you cannot tell and its impossible to get a good pic

    Get Team47b's mrs to do it, she takes a cracking pic ;)

    She's a real artist, she doesn't do cheap bendy shots :D
    my isetta is a 300cc bike
  • dennisn
    dennisn Posts: 10,601
    Russyh wrote:
    Just do it but please make sure you post a video for us all

    Now THAT made my day. :lol::lol::lol:
  • satanas
    satanas Posts: 1,303
    mrwibble wrote:
    bought some bars and one of the drops is out of symmetry, can I heat the bars to gently pull them in a tad?

    Do or do not. There is no try. :roll: