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MementoMori
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Bendy
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Davo
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MementoMori
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 Posted: 20:42 - 16 Apr 2005  Post subject: |
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Cheers, I probably will keep it for spares then even though I have a small head 
More of an incentive to pass my test 
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Courageous T
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| Stu_666 |
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Stu_666
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| Posted: 21:02 - 16 Apr 2005 Post subject: |
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Yeah, I'd never touch a second hand helmet. Don't helmets have a three year life span and then its recommened to chuck it and get a new one?
Perhaps ask any birds if they want to go pillion on the back of the RS50 to make use of it  |
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MementoMori
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| Posted: 21:13 - 16 Apr 2005 Post subject: |
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| mattsmith95 |
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mattsmith95
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MementoMori
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| plugger147 |
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plugger147
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| splinter |
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splinter
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| mchaggis |
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mchaggis
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Posted: 23:37 - 16 Apr 2005  Post subject: |
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I imagine it'd be nice if you had just bought a new one and proceeded to crash in it, to have the older one to use again. The polycarbonate ones are those recommending replacement every 3 years, but you'll be pushed to find any decent helmet nowadays which isn't glass fibre/ composite or better. Those recommend replacement every 5 years or so, but I think the condition and fit of the lining and padding is more important to those ones, in which case they could last longer than that.
The polycarbonate ones tend to go brittle and nasty exposed to the sun and reactive agents in the air, so need to be chucked to avoid them shattering/ cracking when crashed in.
Apart from letting curiosity get the better of you and smashing it up/ cutting it to pieces when you've crashed in it or worn it out, you can always donate it to the ambulance or fire service for training. I think they appreciated it.
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mattsmith95
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| california_rookie |
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california_rookie
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| Posted: 02:43 - 17 Apr 2005 Post subject: |
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Funny topic. I'm currently selling my back-up/girlfriend's helmet on Ebay. It's only been worn once or twice and it's literally in like-new condition. Got the minimum $15 bid on the first day and still have two or three left.
I also tried to bid on a lightly-used helmet for the missus, as she wants it to match all the white gear I got her. Lost to someone who started bidding on it 6 minutes before the auction was over, whilst I toiled away at my work desk. Snipers...
Anyway, I'm assuming that since my 'used helmet' is in exactly the condition in which I'm stating it is, that everyone else's must be as well. Time will tell.
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| New York Doll |
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New York Doll
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| T.C |
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T.C
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Posted: 15:18 - 17 Apr 2005  Post subject: |
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| mchaggis wrote: |
The polycarbonate ones tend to go brittle and nasty exposed to the sun and reactive agents in the air, so need to be chucked to avoid them shattering/ cracking when crashed in.
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That is a wholly incorrect statement. Up to about 10 years ago 3 years was the recommended time scale for a polycarbonate, but new design materials and polymers has changed all that.
BSI has dozens of polycarbonate helmets that have been left outside in all weathers for years, and what they have found is that there is no significant deterioration in the structure or composition of the shell, and there is no strategic breakdown in the polymers.
What is affected is the inner liner which is affected by heat,cold and sweat, and it is this internal lining which does break down and will affect the safety of the hat, but this occurs over a 5 year period not three, unless you sweat a lot or you are a high mileage user.
There is also the issue of liability. If anyone sells a second hand helmet, (even though the wearer has a choice) and an individual is subsequently injured as a result of that helmet, under certain circumstances the previous owner may be held partly liable.
The following may help you which has not been published yet!
Hands up all those who don’t like or disagree with the compulsory wearing of crash helmets? Unfortunately, 80% of motorcyclists killed on the road suffer major head injuries. Head and brain injuries can be caused by low speed accidents, and although modern motorcycle helmets will offer good protection against such injuries, as in all things, there is no guarantee.
In the UK, the only piece of equipment that must be worn at all times when on a motorcycle is a crash helmet, and until July 2000 they had to comply with BS6658-85. After this date new legislation was introduced where under the rules of self certification a new standard of EC22/05 was introduced so any helmet (which is the majority of them now) carrying this mark together with the CE mark would be perfectly legal to wear in the UK regardless of where they were purchased.
All crash helmets are constructed basically in the same way depending on the materials used.
A shell can be constructed from in the main, Polycarbonate (plastic), Fibreglass, Kevlar, Carbon Fibre or a combination of these materials mixed together to produce what is often referred to as a dual- laminate or tri-laminate construction, however, the helmet manufacturers being the clever people that they are, come up with new and inventive materials all the time. The shell is then lined with a polystyrene type liner for shock absorbency which in turn is covered by a foam liner to aid wearer comfort. The securing strap is normally of a nylon type construction attached to the shell by rivets and can be secured to the head by either a double D ring or safety belt type fastener (which I will talk more about later).
Research has shown that the effectiveness of motorcycle helmets has reduced the risk of fatal head injuries by around 50%. It has been suggested that the extra weight of a helmet actually increases the risk of neck injury, but the research has found no evidence to support this. Full face helmets are generally regarded to offer greater protection against facial and chin injuries than open faced helmets, but this may slightly increase the risk of injury to other parts of the head. In the case of a hinged style of helmet which many manufacturers now offer, there is evidence that the protection offered against chin impacts is inadequate, but more worryingly, riders who suffer chin injuries frequently suffer fractures to the base of the skull – the most threatening head injury.
Still with me? Then read on!
Many experienced riders (and often, dealers are also to blame) will say that only the most expensive helmets will afford the rider the highest levels of protection, and on this basis they will suggest that to get the maximum protection it will cost them several hundreds of pounds, well I am sorry to disappoint, but the key to maximum protection is the fit of the helmet regardless of price. Whether a rider spends £500 on a crash helmet of £50, it matters not as they all have to offer the same levels of protection. What is important is getting a helmet that fits correctly and fits the shape of the riders head, and as the saying goes, a £50 helmet that fits correctly will be far more protective than a £500 helmet that fits badly and it is unfortunate that many riders are using their machines with very poorly fitting helmets and in many cases helmets that are also in very poor condition.
Every manufacturer has their own idea of what is a standard head shape. It is therefore important that a variety of crash helmets are tried before a purchase is made simply because if the helmet does not fit correctly it can:
Cause rotation upon impact which can lead to a broken neck.
Come off in the event of an impact.
Cause excessive wind noise.
Lift at speed causing the rider to lose sight of the road ahead as he/she attempts to look through the chin bar rather than the visor aperture.
A crash helmet when new should be a tight fit even to the point where with a full face style helmet, you are just about biting the inside of your cheek, and there should not be excessive pressure on the forehead. A helmet will mould to the contours of your head and will “Give” by about half a size over the first few weeks, therefore what started off as a tightly fitting helmet will soon become a comfortable snug fit, whereas if it is a comfortable fit at the start, it will soon become loose, noisy increase the chance of it becoming detached from your head in a collision and therefore offer far less protection.
As a general rule, and wherever possible a few basic rules should be applied when looking to purchase a new helmet:
• Decide the maximum budget that you can afford.
• Generally speaking, you get what you pay for, but the level of protection remains constant regardless of price.
• A dearer helmet although offering no better protection, will afford better levels of comfort, afford less wind noise (providing it fits correctly), have better fittings and have a better overall build quality.
• Try on a variety of sizes and makes until you find the helmet that best fits your size and shape of head.
• If you find a helmet off the shelf that fits, ask if you can try the same size that is still in its box. It is more than likely that the helmet on the shelf has been tried on by many people and the interior may have become misshapen. A fresh helmet straight out of its box will provide you with a more accurate fitment guide.
Once you have found the helmet that best suits your requirements, without securing the straps, try and lift the helmet off your head by asserting pressure to the chin bar and to the rear of the shell. Also twist the helmet from side to side. If the helmet fits correctly it should remain on your head and only be capable of being removed with a degree of force. If the helmet can be tilted easily, then it may be because you have the wrong style or make of helmet, it may be the wrong size or even the wrong shape in which case you will need to try another make or size.
Once you have found the correct size and shape of helmet and with it securely fastened, make sure that you can easily turn your head from side to side. Many riders find that their head movements are restricted for all sorts of reasons, not least of which is because the style of helmet they are considering or have purchased is wrong for the type of bike they ride or any one of a combination of reasons mentioned previously.
I mentioned earlier about the securing straps, and this is an area that can and does cause problems. Shoei were one of the first if not the first to introduce the seat belt type fastener, and this found favour with many riders as they found that their helmet could be secured with a gloved hand. Over time, many other manufacturers followed suit, but what often is not realized is that over time these straps will stretch and so they cease to be properly secured to the head. If you do have this type of safety catch, then make sure that you check the tightness of the strap on a regular basis, the last thing you want to do is put a loose strap to the test. With a double D fastener of course, the strap is tightened every time the helmet is put on, and personally I prefer this peace of mind even though it may not be as convenient as the safety belt type fastener.
Once you have made your purchase, there are a few general rules that will ensure that you maintain the maximum levels of protection and comfort from your new hat:
Firstly, never loan your helmet to anyone. We are all different in terms of shape and size, and having spent time bedding a new helmet in and getting it to mould to your shape, someone else wearing your helmet could spoil that as they can push it out of shape.
Secondly, never leave it on the saddle or handlebars of your bike. If it falls off, there is no telling what damage you may have caused, and even though it may appear to be perfectly OK from the outside, you may have compromised the shock absorbency of the liner, and the only way this can be checked is either to send it to a specialist helmet technician or send it back to the factory as they are the only people who will be able to return it back to its original accredited CE state in the event that it is OK.
If you do drop it, or you are involved in an accident, I would also advise that it be changed regardless of whether any damage is apparent. Unknown to you, the polystyrene liner may have been bruised or damaged on impact and the shock absorbency of the liner may have been compromised, is it worth taking the risk?
A good well maintained helmet should dependant on use, last about 5 years, however this rule is dependant on a number of factors. If you are a high mileage user, or you perspire a lot, then you may need to consider changing it more regularly, say every 2 – 3 years as the degradation of the liner will be accelerated. It is worth checking to see whether your riding kit (particularly your helmet) can be covered under your house contents insurance. If it becomes damaged, you can arrange a new helmet quickly and without any financial outlay and thereby ensure that maximum protection is maintained.
Buying a secondhand helmet could cause more problems than it is worth, likewise selling a secondhand helmet could cause you more problems than you want!
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It is better to arrive 30 seconds late in this world, than 30 years early in the next |
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| mchaggis |
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mchaggis
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Old Thread Alert!
The last post was made 20 years, 304 days ago. Instead of replying here, would creating a new thread be more useful? |
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