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Crack near bottom bracket

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Crack near bottom bracket

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Old 02-08-19, 01:12 PM
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OlofJens
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Crack near bottom bracket

I was repairing a broken bottom bracket on my Raleigh Montage when I discovered a small crack on the junction of the right chain stay and the little bridge between the chain stays. I wish I can post a picture but the forum doesn't let me. I've already sanded away a little bit of the rust, so it is only on the surface, but you can still see some of the rust that has formed because of the crack.

My bike is a 1985 Raleigh Montage with Reynolds 501 tubing. I recently (approx. half a year ago) repainted it and put on some new parts and really love it (and I certainly don't want to get rid of it).

What should I do?
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Old 02-08-19, 01:28 PM
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Replace the frame * Hang that one on the wall, It cracked from metal fatigue ,, & perhaps interior rust

I doubt you want to burn through some serious money having a professional frame builder re place a frame tube then get it repainted find replica decals and all that ?


* Maybe just get a new bike.. for all the latest components others spend extra , to 'Upgrade'/..





....
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Old 02-08-19, 02:31 PM
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Argh, it was kind of my baby, but yes, makes sense to replace. I just checked and when slightly pulling on the chain stay the gap actually widens, so it is not just a superficial crack.

That said, do you think that this can be welded?
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Old 02-08-19, 02:38 PM
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I would try to fix it. I think two things could happen, if the tube is very thin, then when you try to weld it it's going to open a big hole in the tube and then the bike is junk. Your paragraph if the weld holds, then the frame is fixed.
And I guess the other option is just to leave it as it is. when you put a wheel in the frame, that makes a very strong structure that probably will not fail.
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Old 02-08-19, 02:57 PM
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If I understand your post, the crack is at the joint between the chainstay and the chainstay bridge, not in either tube. If that is the case, I would think it easy enough to have a framebuilder re-braze the joint.
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Old 02-08-19, 03:01 PM
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Thanks for your help! Hmm, I discovered that the crack actually extends into in the chain stay tube... I'm gonna bring it to a mechanic tomorrow, see what he says.
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Old 02-08-19, 03:44 PM
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Originally Posted by OlofJens View Post
Argh, it was kind of my baby, but yes, makes sense to replace. I just checked and when slightly pulling on the chain stay the gap actually widens, so it is not just a superficial crack.

That said, do you think that this can be welded?
I'd have to see it in person to say..

so Yes physically taking it to a professional bike shop is your next step..
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Old 02-08-19, 03:52 PM
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Originally Posted by OlofJens View Post
Argh, it was kind of my baby, but yes, makes sense to replace. I just checked and when slightly pulling on the chain stay the gap actually widens, so it is not just a superficial crack.

That said, do you think that this can be welded?
I'd have to see it in person to say..

so Yes physically taking it to a professional bike shop is your next step..


you need to see how rusty the inside of the tubing is , too so Removal of BB is required
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Old 02-08-19, 04:08 PM
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You don't want to have it welded but brazing is a possible fix if the tubes are otherwise sound. Any frame builder could do the job and you will have to repaint the area around the repair.
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Old 02-08-19, 05:20 PM
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@OlofJens;'s
gallery/album




It could be paint damage. You could try to strip a small portion of the rear dropouts and try to determine the cause.

If it is a real crack, probably time for a new frame, although you might be able to weld/braze it.
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Old 02-08-19, 05:27 PM
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Looks to me like that stay has been dented.
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Old 02-08-19, 06:47 PM
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Originally Posted by CliffordK View Post
It could be paint damage. You could try to strip a small portion of the rear dropouts and try to determine the cause.
OP said the gap widens when pulling on the stay, _probably_ rules out it being just paint. Still worth having a _competent_ frame builder / repairer inspect it.

@OlofJens , what's your location, roughly? Someone here might be able to point you to a reputable person in your area to look at it.
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Old 02-08-19, 10:15 PM
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I'll second the question of the stay's indention at the bridge. I wonder if the other side has the same indented stay. If so this is a very odd aspect. Doing more work at the factory to not gain anything is usually avoided. Andy
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Old 02-09-19, 12:58 PM
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Wonder if Crash damaged? is there a vertical crack beginning to show , directly above the Chainstay brace.. ???
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Old 02-09-19, 02:00 PM
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It looks like there is also some tire rub on the chainstays.

Do you have to spread the chainstays to get the wheel in? What is the measured spacing between the dropouts without a wheel?

Does the frame have vertical dropouts? Is the tire/wheel naturally centered between the rear chainstays/seatstays?

Anything can be repaired, but it looks to me like there likely are a pile of both frame and alignment issues with this bike.

Odd, I see quite a few photos of Raleigh Montage bikes on Google, but not one on E-Bay or Craigslist.

It looks like a fairly neat early MTB, but I'd encourage finding an MTB frame that you like, and swapping over parts.

Or, perhaps this would be a fun welding/building project for an amateur builder.
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Old 02-11-19, 05:01 AM
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Originally Posted by CliffordK View Post
It looks like there is also some tire rub on the chainstays.

Do you have to spread the chainstays to get the wheel in? What is the measured spacing between the dropouts without a wheel?

Does the frame have vertical dropouts? Is the tire/wheel naturally centered between the rear chainstays/seatstays?

Anything can be repaired, but it looks to me like there likely are a pile of both frame and alignment issues with this bike.

Odd, I see quite a few photos of Raleigh Montage bikes on Google, but not one on E-Bay or Craigslist.

It looks like a fairly neat early MTB, but I'd encourage finding an MTB frame that you like, and swapping over parts.

Or, perhaps this would be a fun welding/building project for an amateur builder.
Hi all, again thanks for all your suggestions. And thanks for putting up the picture. If I pull on the affected chain stay, the gap widens, therefore it is not just a problem at the junction between the bridge and the chain stay. I sense from your comments that this is a lost case. Indeed, I think there are also a few other issues related to metal fatigue.

That said, I do not however need to spread the chain stays, the wheel goes in quite easily and seems pretty naturally centred.

I will see what the mechanic says, otherwise I will try to sell / use the parts and see if there is a nice frame coming by. Luckily I have a spare bike that I can use in the meantime, so there is no hurry involved.
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