 Poster: A snowHead
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Obviously A snowHead isn't a real person
Obviously A snowHead isn't a real person
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"Little used" but came in very handy on the day.....
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Well, the person's real but it's just a made up name, see?
Well, the person's real but it's just a made up name, see?
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@pam w, exact....
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You need to Login to know who's really who.
You need to Login to know who's really who.
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“No major crashes”. Define major
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Anyway, snowHeads is much more fun if you do.
Anyway, snowHeads is much more fun if you do.
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| dan100 wrote: |
| “No major crashes”. Define major |
Never worn by Richard Hammond 
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You'll need to Register first of course.
You'll need to Register first of course.
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That looks to me like it fell off a table or similar rather than a massive impact. While I’d not buy it (or any helmet) second hand, do you think it would necessitate replacing?
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| Skimum1 wrote: |
| do you think it would necessitate replacing? |
Absolutely! Helmets do stand up to a few light knocks, e.g. every time you bump you head on the chairlift safety bar, but this doesn't tend to deform the helmet. They are made of polystyrene, so if this has been compressed already, there isn't any “crumple zone” left to protect your head! If your helmet looks like this, chuck it in the bin.
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You'll get to see more forums and be part of the best ski club on the net.
You'll get to see more forums and be part of the best ski club on the net.
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Thanks @Scarlet, off to give mine the once over.
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@Skimum1, Also turn it over and look for cracks around the rim. You may need to gently move it with your fingers to see if anything shifts more than it should. And if it's old (10 years? There will be different theories about this...) replace it anyway, you only have one head 
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snowHeads are a friendly bunch.
snowHeads are a friendly bunch.
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Thanks. It’s only seen about 5/6 skiing weeks and is about 3 years old but it has a dink on the top where it’s rolled off somewhere.
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And love to help out and answer questions and of course, read each other's snow reports.
And love to help out and answer questions and of course, read each other's snow reports.
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| Scarlet wrote: |
| Skimum1 wrote: |
| do you think it would necessitate replacing? |
…. If your helmet looks like this, chuck it in the bin. |
Or sell it on ebay. 
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You know it makes sense.
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@Skimum1, ….yep…we know POC products inside out…that’s had far more of a bash than a fall from a table. Possibly a crush in a bag in a ‘plane hold, or some incident in storage (like a much heavier object falling on it) but also possible a big whack on the hill. Scarlet is right - visible compression of the material (as in this case a 2-3mm deep area of denting) is a bad idea re the performance of the helmet in another hit. I’ve worn worse, but I wouldn’t be selling it on ebay as ‘little used and no major knocks’. It has had a major knock.
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Otherwise you'll just go on seeing the one name:
Otherwise you'll just go on seeing the one name:
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@Scarlet, …interesting re ‘ageing’ of helmets. I have seen foam fall to bits through internal chemical reactions over time but the old idea that EPS needs to be replaced every five years (some manufacturers state this) was somewhat overridden by some independent research which found no aging processes in EPS foam:
https://pubmed.ncbi.nlm.nih.gov/26902784/
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Poster: A snowHead
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Obviously A snowHead isn't a real person
Obviously A snowHead isn't a real person
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Looks positively perfect when compared to what was being hired out to the kids in L2A many years ago and why we bought the girls their own helmets after that!
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Well, the person's real but it's just a made up name, see?
Well, the person's real but it's just a made up name, see?
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You need to Login to know who's really who.
You need to Login to know who's really who.
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I am reminded when I went to look at a second hand Z900 in Bonneville.
Before I went, the owner said it had a small dent where it had fallen off its stand.
When I saw the bike, pretty much every panel was dented, the pegs and levers were bent, bar ends and fork ends scratched TF, the exhaust had been changed over and there were new after the market indicators.
I can only assume that the falling off the stand incident happened while it was on the edge of a cliff.
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Anyway, snowHeads is much more fun if you do.
Anyway, snowHeads is much more fun if you do.
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@OuatteDePhoque, 
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You'll need to Register first of course.
You'll need to Register first of course.
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A slight dent, the size of a 50p, is hardly massive compression! Probably just a slight dent in the outer skin with negligible effect on the PS body.
This is from the Rossignol website
Glossaire
ABS: Outside shell of the helmet made out of plastic (polycarbonate) moulded as light as possible, but with good shock absorption. These helmets offer more durability against everyday falls, while providing a good impact protection.
They clearly don't know their polymers, ABS is Acryonitrile Butadiene Styrene copolymer, not Polycarbonate, which is a different polymer.
Certainly on my helmet (I do actually own one) the thin ABS shell can be compressed in various places, indicating that there is a small void between the shell & body, this has always been there from new. The helmet now has numerous dents in the outer shell from minor knocks that are unlikely to cause much if any deformation of the EPS body.
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@tangowaggon, ….up to point Lord Copper. Yep, I have used Polycarbonate thin shell helmets that look as though they have been in a war zone (Giro mainly). But I guess the key thing is that I wouldn’t sell them as ‘little used’.
As I mentioned, we know POC products well. For example, the POC Fornix and Synapsis avoid the issue of gap between layers which you describe, by using a tight in-mould process. The Synapsis can get easily marked up or have small depressions on the thin Polycarbonate shell. But the advertised helmet has a number of obvious impact points on the right hand side, not just one depression, as well as a scratch and chip to hard plastic air intake. It may not have been the case that these were all done at the same time, I recognise that. But due to the tight in-mould structure of the Synapsis (even with its aramid layer), I wouldn’t buy a Synapsis with an number of areas of impact damage of the kind on this example.
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FAQ
It was only visible from underneath and when wiggling it a bit. That was replaced with a quick run round resort shops at the beginning of the next outing 