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Helmets - mean time betweef failures



 
 
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  #11  
Old January 4th 06, 01:36 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

Met offer a crash replacement policy, not free but cheaper than buying
a new helmet. Some distributors offer an inspection service, but none
offer a repair service.

Kinda hard to do repairs on one part of a helmet, as the helmet as a
whole absorbs the impact and impact damage is not neccessarily visible.

Plus I dont think anyone would want to place their name behiond the
partial refurbishment of a used helmet

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  #12  
Old January 4th 06, 01:54 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures


Peter Keller Wrote:

I agree with all your points, that bicycling is very safe, and helmets
don't do much to improve safety.
However, this thread started with a legitimate question on how long a
helmet (or more specifically the polystyrofoam liner) should last.

Every query's legitimate in my book, but I take your point. Take my
point that earlier in the thread I gave a considered reply, which has
been echoed by others.


I can't really see the connection between that and whether one should
be
wearing a helmet at all!!

That post was in response to a post stating that anyone who does not
wear a helmet may have `a five dollar head.'


--
EuanB

  #13  
Old January 4th 06, 02:04 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures


Rayc Wrote:
If you dont feel
that helmet work, prehaps you can get past the laws by carrying it on
you and not actually wearing it.

You make it sound like I have a choice. As a law abiding resident
(working on citizenship) I don't.



Well. maybe...... but I for one am quite happy to wear a
helmet, even
on 35degree days. The day the you go too far on your new ETSX, or too
close to that tree on the corner, you might want that helmet on your
noggin.

I don't consider mountain biking to be as safe as normal cycling. The
terrain is challenging and I'm generally pushing myself really hard,
esepcially at the moment as I don't have mountain bike fitness. I
wouldn't consider riding off road without a helmet as the risk of
coming off is far greater than it is on the road.

The ETSX is a lot of fun :-)


--
EuanB

  #14  
Old January 4th 06, 02:10 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

On Wed, 04 Jan 2006 11:54:01 +1100, EuanB wrote:


Peter Keller Wrote:

snip

I can't really see the connection between that and whether one should
be
wearing a helmet at all!!

That post was in response to a post stating that anyone who does not
wear a helmet may have `a five dollar head.'


Very good point!

Peter

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  #15  
Old January 4th 06, 02:11 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

EuanB wrote:
snip
I don't consider mountain biking to be as safe as normal cycling. The
terrain is challenging and I'm generally pushing myself really hard,
esepcially at the moment as I don't have mountain bike fitness. I
wouldn't consider riding off road without a helmet as the risk of
coming off is far greater than it is on the road.

snip

Even though I'm far more competent at road riding than mountain biking,
I consider mountain biking safer. The primary threat to my safety is my
own lack of skill. Whereas on the road, the primary threat to my safety
is something I can't control - other drivers. If I come off my bike,
downhill, at 60km/h, it's going to hurt regardless of whether I'm on the
road or the trail. But at least on the trail, I'm not going to
concurrently get hit by a tonne of metal.

Tam
  #16  
Old January 4th 06, 02:14 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

On Tue, 03 Jan 2006 16:36:50 -0800, Rayc wrote:

Met offer a crash replacement policy, not free but cheaper than buying
a new helmet. Some distributors offer an inspection service, but none
offer a repair service.

I am not sure if an "inspection" service is useful at all. The propaganda
is that after any knock, however minor, the helmet should be replaced as
damage to it may be invisible but still real, thus lessening greatly
whatever protective properties it had.

Peter

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  #17  
Old January 4th 06, 02:18 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

Peter Keller wrote:

On Tue, 03 Jan 2006 16:36:50 -0800, Rayc wrote:

Met offer a crash replacement policy, not free but cheaper than buying
a new helmet. Some distributors offer an inspection service, but none
offer a repair service.

I am not sure if an "inspection" service is useful at all. The propaganda
is that after any knock, however minor, the helmet should be replaced as
damage to it may be invisible but still real, thus lessening greatly
whatever protective properties it had.

Peter


I found a miniature compression spot on a helmet after I'd stacked it...
which happened to correspond to a small bruise on my head, so I decided
to check it out. When we peeled back the plastic, we found a massive
crack that was not at all visible from outside. The bike shop was very
responsible and insisted I smash the crap out of the helmet so that no
one would take it out of the bin and try to use it. The thought of that
scared me - I am always amazed when people sell second hand bikes with a
helmet included.

Tam
  #18  
Old January 4th 06, 02:29 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

Peter Keller wrote:

I agree with all your points, that bicycling is very safe, and helmets
don't do much to improve safety.
However, this thread started with a legitimate question on how long a
helmet (or more specifically the polystyrofoam liner) should last.
I can't really see the connection between that and whether one should
be wearing a helmet at all!!


The connection is that, if you leave your helmet in a dark cupboard and
never get it out, it should last a very long time.

Theo


  #19  
Old January 4th 06, 02:30 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

In aus.bicycle on 3 Jan 2006 15:42:58 -0800
Rayc wrote:

so manufactuers have said 5 yr max and then you need to factor in wear
accelerants(sp?)
but then again do you want to stretch the ability of a helmet to
effectively absorb impact force?


Just to make life more difficult... The bod in charge of testing
motorcycle helmets for Oz compliance recently tested a bunch of old
helmets - some worn a lot, some not much, the oldest 12 years old.

They all passed.

Meaning that it isn't at all clear that age wearies them and the years
contemn. It looks like just crashes bugger 'em up.

As to the original problem of polystyrene falling off, I suspect that
there isn't enough info about minor knocks and UV exposure to give a
good answer.

Zebee
  #20  
Old January 4th 06, 02:31 AM posted to aus.bicycle
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Default Helmets - mean time betweef failures

On 2006-01-04, Tamyka Bell (aka Bruce)
was almost, but not quite, entirely unlike tea:
downhill, at 60km/h, it's going to hurt regardless of whether I'm on the
road or the trail. But at least on the trail, I'm not going to
concurrently get hit by a tonne of metal.


Yeahbut, at least a car is theoretically movable[1], and hence absorbs
some of your energy. A tree is a rather immovable object


[1] Why is it that tiny little 600kg cars always seem to give me more
room? Oh yeah, they'd feel it

--
TimC
It's written GNU/Linux, and pronounced "Linux". Or, "Linux, with a
silent GNU/" -- Kubric on /.
 




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