I'm in the club now.
Bike Forum
[closed]
Check my crack out
-
Posted 2 years ago #
-
yep - thats goosed!
Posted 2 years ago # -
gaffa tape and tie wraps'll sort that.....
Posted 2 years ago # -
The chainstay protector looks a little ironic now.
Posted 2 years ago # -
bloody hell, what year is that frame?
More importantly, what were you doing with it?Posted 2 years ago # -
That'll t-cut out, wouldn't worry myself
Posted 2 years ago # -
2009 frame and I was riding it as it was designed for DH Marathon/Enduro.
Nothing 'happened' that made me stop. Just rode a trail then back to car and noticed wheel wasn't aligned.
Posted 2 years ago # -
Wouldn't worry about it. We can see from the photo that the gear cable is holding everything together!
Posted 2 years ago # -
I've a friend with a Meta 5 frame where his top tube has cracked, but the swingarm is fine, but its an older version - will that fit?
http://www.thecyclepeople.com/admin/pages/upload/products/Meta5Team.jpg
Looks like this one.
Posted 2 years ago # -
I thought all of the 09 ones were supposed to have been sorted? or is that the 10 ones?
Posted 2 years ago # -
More importantly, what were you doing with it?
Attacking it with an angle grinder by the looks of it.
Posted 2 years ago # -
i've fixed worse than that with a shoe lace, an innertube, and some leccy tape.
i'm not kidding.
Posted 2 years ago # -
That'll t-cut out, wouldn't worry myself
Heh! Bit of Polyfilla; job's a good'un!
Posted 2 years ago # -
[fractologist mode]That is interesting, it does not appear to be near a weld or any other stress raiser other than the change of section and angle. It would be very itneresting indeed if a fatigue crack started there without any local discontinuities. Or can you show us more details, maybe there is something that I cannot see from this pic. [/end fractologist mode]
Posted 2 years ago # -
it is at the main stress point though, half way between the two pivot points
good going Rob, you do ride bigger hills than most though
Posted 2 years ago # -
Should be under warranty if it is a 2009?
Send Madison pics of the Complete build (if you are in UK), plus a pic of the Serial Number (and the cracks) and they will raise a claim with commencal.
Got my replacement 2010 frame in 2 weeks (although mine was gone in the shock mount welds; not there!!! You may just get a swingarm. Check for those telltale signs in the welds.
Posted 2 years ago # -
Well without doing some stress analysis then its not necessarily obvious where you would find peak stresses. If it cracked there and its a smooth continuous surface then it has implications for the design, the manufacture/quality of the material or the way he used it, either way its very interesting.
Posted 2 years ago # -
could be the end of the butting for the weld? A lot of cracked frame's i've seen near the headtube go where the butting is
*stipend*
i'm no engineer, just bored.
Posted 2 years ago # -
Obviously without a proper examination its just conjecture but there may well be something round the back we cannot see. I want to see more I am intrigued now. I do love a crack..
Posted 2 years ago # -
rhs, about time you broke something......
Posted 2 years ago # -
Higher strength aluminium alloys do not always have higher FRACTURE TOUGHNESS.
"THE highest strength wrought aluminium alloys currently available are based on the aluminium-zinc-magnesium-copper system, and such alloys offer considerable potential for weight savings in airframe structures. However, these alloys have presented problems in service, arising from deficiencies in fracture toughness and fatigue crack propagation resistance together with a susceptibility to exfoliation corrosion and stress-corrosion, which have led to restrictions being placed on their use by individual aircraft companies and by procurement authorities in a number of countries. This situation has led to the wide-spread use in the UK and continental Europe of lower strength alloys of the aluminium-copper-magnesium-silicon type, even though significant weight penalties are incurred in the process. There has been a more general acceptance of the high strength aluminium-zinc-magnesium-copper alloys in the USA, where problems associated with their use have been partially alleviated by a willingness to replace components at short intervals, but even so during recent years a trend has developed there towards the use of lower strength versions of these alloys in attempts to improve airframe durability and reliability. "
Posted 2 years ago # -
Cheers Dancake: Have started process already.
good going Rob, you do ride bigger hills than most though
Um..it was in Ae Forest, Scotland.
Posted 2 years ago # -
Send us some more piccies!!!!
Posted 2 years ago # -
Nightmare, better than the leg though. lol.
Posted 2 years ago # -
Its ok. Things break. Thats the way it is.
No more pics I'm afraid
Posted 2 years ago # -
Ahh well.
Yeah at least you can buy a new frame, broken leg is mucho worse...
Posted 2 years ago #
Topic Closed
This topic has been closed to new replies.
