Chances of repairing this cracked frame?

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

Good welder will be able to plate over that.

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)

or see what cotic say?

Who said it was a cotic?

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

Looks like that frame might have been over-loaded 😉

FFS attempting emoji…

?

Well that doesn’t work

I was going for the hands over eyes one

@scotroutes.

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

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.

@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

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

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

Good luck with the repair.

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.

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…

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)

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

Fair point stu.

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.

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.

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.

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.

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.

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

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

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

Ask the OP.  it needs to be Hibs choice.

@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 🙂

Is there a chance both pictures are the same bike?

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

“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.

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

Hope the OP has been bhoyed by the responses…

Possibly had water in and frozen

Definitely a cool and interesting crank anyway!

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?

Aeroe spider rack. Is my guess.

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!

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. 🙂