macspeedy
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 posted on 4/11/09 at 07:50 PM |
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help with welding and strengthing mountain bike frame
At the end of last year i bought a Iron horse MKIII Elite mountain bike, all was well for 9 months until i started having problems with the rear tyre
hitting the inside of the trailing arm under torque.. this was traced to a crack in the trailing arm upright on the right hand side..
linky to manufacturers web page
this was replaced... all was well again untill about 3 months later until the same thing happened again.
during the time i have had the bike Ironhorse has gone bust and spare rear frames have dried up! and the new owner hasn't said if they are going
to take on warranty issues. I am getting a few hopefully broken rear frames back to try and fix.
So what i am asking is who would be best and what design changes within reason can i do to try and resolve this issue.
On a legal note does anyone know if the bike shop i bought it from is legally responsible in any way?
Any ideas gratefully received... 3 months now..
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flak monkey
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| posted on 4/11/09 at 07:52 PM |
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Is it ali or steel?
Which member is breaking?
Sera
http://www.motosera.com
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macspeedy
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| posted on 4/11/09 at 08:00 PM |
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bloomin bike
red line both times... ally
[Edited on 4/11/09 by macspeedy]
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jacko
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| posted on 4/11/09 at 08:11 PM |
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Can you make new parts in steel or s/steel ?
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02GF74
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| posted on 4/11/09 at 08:14 PM |
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you mean half way up the uproght in the rear triangle?
 
broken frame
that is weird place to go - I can only guess that the tube is far too thin.
to fix that, install a thicker tube or sleeve the old one, easier said than done.
alternatively some fillets down either side.
are you fixing this for yourself? if you are fixing other peeps bikes, then are you covered if your fixed frame falls apart causing injury or
death?
[Edited on 4/11/09 by 02GF74]
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macspeedy
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| posted on 4/11/09 at 08:33 PM |
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Yeah this is a weak spot that is known worldwide with this frame. It is my bike that i am fixing for me. I have put the fact the frame broke down to
the fact most of the frames for xtrail or downhill bikes have a lot longer length of that frame member, therefore spreading the stress..??
linky to discussion on forum
linky
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macspeedy
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| posted on 4/11/09 at 08:45 PM |
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just looked at that linky it has been updated recently... i am raging  i was told there was a worldwide shortage of rear frames..
bullSH*T LINK
cant believe it someone is gettin an ear full tomorrow !
ffs!!!! aaaaaaaaaaaaaaaaahhhhhh
[Edited on 4/11/09 by macspeedy]
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Theshed
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| posted on 4/11/09 at 10:03 PM |
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Well I can answer the legal question. The contract between you and the shop contains the implied term that the bike/frame would be of satisfactory
quality. In deciding whether goods are satisfactory regard must be had to whether they are durable.
It seems to me very likely that 2 failures in a year would suggest that the goods were not durable and point towards unsatisfactory quality.
Reasonably strong case I would think. If you purchased with a credit card you have the same argument with your card company (useful if the shop goes
bust too).
You might face arguments that you have been abusing the bike etc however your internet searches suggest that this was a design fault in which case you
are cruising....
Having said all that......If a polite but forceful approach to the shop does not work...you would have to be particularly pissed of to bring a small
claim - think a day off work and a few hundred pounds in court fees....
nice bike...cracking in fact ....sorry!
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02GF74
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| posted on 4/11/09 at 10:29 PM |
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blimey - the whole thing looks beefed up.
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Phil.J
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| posted on 5/11/09 at 08:55 AM |
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Looks a very light-weight structure for the sort of use these bikes are expected to cope with, as is the whole frame. On the other hand it should be a
straightforward job for a decent fabricator to fix and beef up.
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contaminated
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| posted on 5/11/09 at 01:05 PM |
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Typically during a take-over the new owner will have to honour warranties. It should form part of their due diligence. If they are just buying assets
it's different.
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macspeedy
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| posted on 7/11/09 at 11:42 AM |
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well i have the second of the broken frames back, this one broke in a different place.
I am looking at making a plate of ally 3mm thick high quality stuff and getting it welded to the front leading edge of the triangle as it sits on the
bike.
what do you guys think and can anyone here help, or suggest anywhere to get it done?
Thanks
Graham
[Edited on 7/11/09 by macspeedy]
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