Home Forums Bike Forum Chances of repairing this cracked frame?

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  • Chances of repairing this cracked frame?
  • el_boufador
    Full Member

    Steel frame.

    Noticed this the other day. I’ve taken a bit of paint off to see it better.

    It’s underneath the bend in the non drive side chain stay to get around the tyre.

    It’s a really strange place to get a crack. I can only think it was weakened during the manufacturing process(?)

    What are the chances of it welding up ok?

    Not saying what frame it is yet – I’ve not contacted the manufacturer to see what they might be able to do, which is the next step.

    Just wondering about my options is all

    20241022_201041

    2
    Brainflex
    Full Member

    Good welder will be able to plate over that.

    3
    RustyNissanPrairie
    Full Member

    Yeah – I’d fill the crack with Tig braze then cut a curved rounded cornered 0.9mm plate and braze that over the top..

    So yes – it’s steel, it’s infinitely repairable (within reason)

    bruneep
    Full Member

    or see what cotic say?

    el_boufador
    Full Member

    Who said it was a cotic?

    But yeah, taking it up with the manufacturer is next step

    1
    scotroutes
    Full Member

    Looks like that frame might have been over-loaded 😉

    3
    el_boufador
    Full Member

    FFS attempting emoji…

    ?

    Well that doesn’t work

    I was going for the hands over eyes one

    8
    singlespeedstu
    Full Member

    @scotroutes.

    That’s not a very nice post when the OP is trying to resolve things without being a ****.

    3
    GeForceJunky
    Full Member

    How old is the frame? That could be due to water collecting there causing internal rust. It’s an odd way to crack, but yes, easily repairable.

    5
    el_boufador
    Full Member

    @singlespeedstu thanks but I think it was tongue in cheek (well, it was taken that way by me anyway!)

    Worse things happen at sea, as they say

    el_boufador
    Full Member

    @geforcejunky, yeah, that could be a plausible explanation. It’s about 5 years old, I’m the second owner.

    7
    sharkattack
    Full Member

    To be fair when I opened the thread earlier I saw an upside down Cotic.

    Good luck with the repair.

    2
    singlespeedstu
    Full Member

    Worse things happen at sea, as they say

    They do indeed but still no need for that kind of a post from anyone but  you.

    Quite rightly you chose to give the manufacturer a chance to put things right without being a dick about it.

    Hope it works out for you either way.

    1
    faustus
    Full Member

    I think being the second owner and that age would be very difficult to expect much, but they’re renowned for their good service…Cy even pops on to this forum so who knows…

    1
    andrewh
    Free Member

    I can’t see that naming them hurts, quite the opposite.

    If they deal with it well then the OP can come back on here and say ‘they sorted my problem brilliantly, I recommend them’ and if he feels that they handle it badly he can come back and say ‘they didn’t deal with my problem well, I think you should avoid them’

    Us seeing what types of bikes crack where is useful information if we are in the market for one, and i would prefer people to name them. It  is also useful seeing how the manufacturer responds if they do . He has said nothing disparaging about them, just stated that something has happened and we can then form an option of them based on how often or not this happens and how they deal with it. (FWIW I’ve found Cotic to be very good to deal with and do recommend them)

    1
    singlespeedstu
    Full Member

    I can’t see that naming them hurts, quite the opposite

    This is the OP’s choice though not for someone else to name them after he’s  said

    Not saying what frame it is yet

    2
    andrewh
    Free Member

    Fair point stu.

    didnthurt
    Full Member

    Worst case, Cotic might offer a discounted replacement. Thats what happened when I damaged my Soul and contacted them about recommending someone who could repair it for me.

    GeForceJunky
    Full Member

    The correct way to repair it would be to replace the whole chainstay, which is never going to be cheap as to do it well requires the correct bit of tube and some careful welding. I personally would just pop to a local garage and get them to mig some weld over the area then grind it flatish and put a bit of touch up paint on it.

    1
    mick_r
    Full Member

    I’ve cracked the odd tube in that kind of area when ovalising them (at the peak of the oval).

    Quite possible it has collected water there, but rare to have corroded through in 5 years and it would usually be holes rather than a crack (but stress raisers from corrosion holes could then initiate a crack).

    Just welding already fatigued metal usually just cracks again quite quickly. Another forum member is experimenting with a TIG weld only repair of a crack in that area so will be interesting to see how that lasts.

    I’d stick a shaped patch on top using silver solder as that is the lowest temperature and least stress raising option. Or get the whole tube replaced which doesn’t need to be too drastically shaped on the NDS.

    5
    anagallis_arvensis
    Full Member

    If he’s not the original owner I would expect Celtic to politely tell him to jog on and this would not in the slightest affect my view of a them as a highly respected company.

    4
    funkrodent
    Full Member

    If he’s not the original owner I would expect Celtic to politely tell him to jog on

    Seems to me that there’s a Rangers of different ways in which they could choose to handle this.

    3
    TomZesty
    Full Member

    Yep, an old firm like Cotic will be experienced in what to do here.

    2
    Watty
    Full Member

    Oh have a Heart(s)! Cy’ll sort him out.

    2
    kayak23
    Full Member

    Oh have a Heart(s)! Cy’ll sort him out

    Ask the OP.  it needs to be Hibs choice.

    1
    stanley
    Full Member

    @scotroutes was clearly joking. That bike is nothing like overloaded and that wouldn’t be the first place to crack if it were.

    The OP’s picture shows a Cotic:  it’s Cotic green and has Cotic stamped on the BB.

    I’d get it repaired, update the colour, and enjoy riding it for another 5 years 🙂

    1
    jamiemcf
    Full Member

    Is there a chance both pictures are the same bike?

    1
    funkrodent
    Full Member

    Hopefully Cy will know how to handle it, though there’s no way of knowing if he’s Aberdeen here before

    2
    robertajobb
    Full Member

    How old is the frame? That could be due to water collecting there causing internal rust.”

    My exact thought.  It’s rusted through from the inside.  The tricky bit for welding is that the welder will need to cut of some of the cracked area (otherwise they’re welding thin rust together.  Or maybe better, a thin plate shaped to fit over the tube maybe 2 inches long? And welding it on the outside as a patch.  Just depends on how much more rust there is and how little actual steel remains to weld to.

    (For exame Shand say they anti-rust treat the inside of frames after making – and also tell owners to repeat yearly.   I’d suspect Cotic don’t as to be desired to them it’s more cost to do and Cotic are making / selling to a price point, not selling at boutique ‘it will cost what it costs’ price.

    1
    robertajobb
    Full Member

    ‘Fair’, not ‘desired’ ! Fhecken auto-uncorrect.

    MrSparkle
    Full Member

    Hope the OP has been bhoyed by the responses…

    robido
    Full Member

    Possibly had water in and frozen

    Northwind
    Full Member

    Definitely a cool and interesting crank anyway!

    garage-dweller
    Full Member

    Slight diversion, what’s that rear rack setup on the back of the bike in the completely unrelated picture of a green bike further down the thread?

    retrorick
    Full Member

    Aeroe spider rack. Is my guess.

    el_boufador
    Full Member

    Yeah it’s an aeroe spider rack on the completely unrelated bike in the above picture – it’s very good.

    Thanks for the responses all!

    scotroutes
    Full Member

    it’s an aeroe spider rack on the completely unrelated bike in the above picture – it’s very good for carrying big bags of marshmallows for my campfire

    FTFY. 🙂

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