Jas
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Registered: 13th Oct 04
Location: Mid Wales
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I've got the chance to buy a really cheap mountain bike frame which is worth a fair bit to buy
Only problem being It once experience a small crack so he had a plate welded on it
Id like to keep it and make a little project bike
but is it likely to brake on me?
Im just not too clued up with welds etc?
[Edited on 22-03-2010 by Jas]
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
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if done properly shouldn't be a problem.
wouldn't bother me, just keep an eye on it lol.
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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ok, I was going to get my mate to strip it down and spray rear black and front white, maybe try tidy up the plate while he does so
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ed
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Registered: 10th Sep 03
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An aluminium bike frame will be heat treated, therefore a repair is a no no.
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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seriously? :/
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ed
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Registered: 10th Sep 03
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Well, you'll have to find out what it's made of. Aluminium is a single term for such a wide range materials! If it's heat treated then it's quite unlikely the repair will be very successful.
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
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seen fair few similar repairs that have worked just fine,
And being a engineer/welder, that also does tig welding I'd be confident it'd be fine,
Looks like a xc frame? So won't be under huge stresses like a dh frame etc. Like I said I'd just keep an eye on it.
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richc
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Registered: 24th Mar 07
Location: Ilkeston
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Be rate
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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yes its an xc frame, i'll get some close ups of the weld now
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Jas
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Location: Mid Wales
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http://is.pinkbike.com//photo/3519/pbpic3519084.jpg
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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quote: Originally posted by ed
Well, you'll have to find out what it's made of. Aluminium is a single term for such a wide range materials! If it's heat treated then it's quite unlikely the repair will be very successful.
Frame is AluxX SL 6013
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ed
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Registered: 10th Sep 03
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I'd imagine that's cracked because of fatigue. It says on my data sheet that 6013 aluminium should be heat treated after welding. Buy the frame at your own risk TBH.
What kind of XC bike has a chain guide like that too?
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Doug
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Registered: 8th Oct 03
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Stop being a pikey Jas.
You have changed since I moved away.....
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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suck me beautiful
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xa0s
Banned
Registered: 4th Mar 08
Location: Dartford, Kent Car: Turbo'd Fabia vRS
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Zilent:
*If it was an aluminium frame, I wouldn't trust anything but a tig
Kryptix:
*but if it was tig'd, it'd be ok?
Zilent:
*That depends on how well the weld was shielded by the sheilding gas, the penetration of the weld, the type of weld (butt weld, plate, etc)
*Also depends on how much the rider beats the hell out of it
*If it was tigged correctly, it'll be stronger than original
Mate of mine who's a welder.
[Edited on 23-03-2010 by xa0s]
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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yes spoke to a couple of mates who weld yesterday, but they don't do alu
and they said providing its clean and there are no cracks it should be fine
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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quote: Originally posted by ed
An aluminium bike frame will be heat treated, therefore a repair is a no no.
Ditto
Will be 7075 alu.. Wanker to weld as its so brittle once welded.
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ed
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Registered: 10th Sep 03
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He seems to think it's 6013...
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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quote: Originally posted by ed
What kind of XC bike has a chain guide like that too?
Giant Faith isnt it? More of a free-ride bike
The NRS is the XC bike
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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nah its giant AC and yes its 6013
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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If you weld it, it will more than likely crack around the welds eventually and you'll be chasing the cracks away
A shit hot areospace welder with access to an ultrasonic crack detector could sort it for you but you got to find one lol
I had a fox shock that had cracked sorted out by my old dears neighbour who is just one of said shit hot welders.. It was fine for years
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Jas
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might have to just ebay it then, dont think id lose to be honest, just a frame that Ive always liked the look of for a very small price
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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What did you pay for it?
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Jas
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Registered: 13th Oct 04
Location: Mid Wales
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40 quid
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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If you get stuck I'll buy it
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