Inner tube around helmets

#1
Can anyone tell me why certain types have what appears to be bike inner tube around the rim of their helmets. Is it to stop the cover from popping off if it's a tight fit? Or stop the cover wearing out on the edge of the helmet? Any other suggestions?
 
#3
1st guess is correct, plus it makes you look hard, plus its funny trying to watch someone put one on (and its lorry tire innertubes cut into slices, you definately would look a twat with a pushbike innertube round your lid!
 
#5
Top of an NBC boot is easier to get on than an inner tube! If you are inclined to use one.
 
#6
Landrover inner tube is the perfect size, but you sometimes have to warm it in boiling water to get it onto the rim. Hours of fun, and not to be done in earshot of anyone averse to blue language...

Originally used on para helmets, 'cos when the clothing development people designed the helmet cover, it didn't occur to them that it might have to withstand a 120 mph wind getting under the rim. (In the same way that they thought cheap knicker elastic would be sufficient to hold cut cam onto the helmet.... obviously they had never, ever ventured outside of their comfy design studio!).
 

Cutaway

LE
Kit Reviewer
#7
smudge_re said:
Can anyone tell me why certain types have what appears to be bike inner tube around the rim of their helmets. Is it to stop the cover from popping off if it's a tight fit? Or stop the cover wearing out on the edge of the helmet? Any other suggestions?

My problem's always been tyring to find a bike with a wheel dia. close to that of my lid.

Tried it with one from the nipper's racer but I had to double it over so much that it looked like I was wearing a fecking Pontefract cake.
 
#8
Don't want to be a spoilsport, but with the welfare of the lads at heart:

Has anyone actually checked whether the ballistic protection of the helmet is adversely affected by fitting a tight band around the rim? If excessively tight (and 4(T)'s comment suggests it may be), stresses will be put on parts of the helmet where they were not intended and so might strain the fibre reinforcement to the point that the helmet shatters when struck.

Just a thought...
 
#9
putteesinmyhands said:
Don't want to be a spoilsport, but with the welfare of the lads at heart:

Has anyone actually checked whether the ballistic protection of the helmet is adversely affected by fitting a tight band around the rim? If excessively tight (and 4(T)'s comment suggests it may be), stresses will be put on parts of the helmet where they were not intended and so might strain the fibre reinforcement to the point that the helmet shatters when struck.

Just a thought...
Spoil sport :lol:
 
#10
Cutaway said:
My problem's always been tyring to find a bike with a wheel dia. close to that of my lid.

Tried it with one from the nipper's racer but I had to double it over so much that it looked like I was wearing a fecking Pontefract cake.
Cuts, with your Hydrocephalus-distorted head, I'm surprised that they found a lid big enough - did they get it specially made? If they did, I'm sure an inner-tube from this would be a tight fit:

 
#11
putteesinmyhands said:
Don't want to be a spoilsport, but with the welfare of the lads at heart:

Has anyone actually checked whether the ballistic protection of the helmet is adversely affected by fitting a tight band around the rim? If excessively tight (and 4(T)'s comment suggests it may be), stresses will be put on parts of the helmet where they were not intended and so might strain the fibre reinforcement to the point that the helmet shatters when struck.

Just a thought...
Para helmets offer ballistic protection?

I thought that was achieved by discarding the helmet and wearing the maroon beret instead - useful bit of kit, also offers NBC protection and enhances manhood, apparently....
 
#12
Putty, that is some Wah!! to think the inner tube could do that? so they have taken stupid out of the dictionary
 
#13
No, it's not a wah. I can go along with using black nasty but pre-stressing a resin helmet may not be a good idea. Obviously, the question only arises if the inner tube is ridiculously tight.

edited to add:

Toughened glass is an amazingly strong material but shatters easily if you strike it with a point in the right place. If you stress it (e.g. by bending) it takes a lot less to break it.

(and yes, I know helmets aren't made of toughened glass, but the principle is the same).
 

Legs

ADC
Book Reviewer
#15
crosshill said:
Will the tin foil around my helmet affect the ballistic protection?

If so what is the best way to prevent alien mind probes?
Wear it on the inside! Don't forget though, that it'll have to be thicker foil (or folded over) because the helmet will magnify the brianwaves that are hitting you.
 
#16
smudge_re said:
Can anyone tell me why certain types have what appears to be bike inner tube around the rim of their helmets. Is it to stop the cover from popping off if it's a tight fit? Or stop the cover wearing out on the edge of the helmet? Any other suggestions?
I said this somewhere else but can't remember the thread!

My unit used to wear inner tubes (DAF/Bedford type as they weren't to tight or to loose) to protect the edge of the cover, to stop the cover riding up and mostley for attaching Hayricks (SOPs were to wear 2 inner tubes).

NBC boots seem to stretch and eventually fall off (saw a couple of blokes from 26 wearing them in Iraq) and if you ask the lads they never seem to know why they ut them on their helmets.

Smudge re... don't I know you? aren't you an engineer called smith??
 
#17
If you leave the valve on the innertube and had a cycle pump you could use it as a Buoyancy aid no?
 
#18
Harry_Boomers said:
If you leave the valve on the innertube and had a cycle pump you could use it as a Buoyancy aid no?
Reminds me of the "life preserver" sketch in "The Longest Day" :lol:
 
#19
I have had this asked of me loads of times, even the OC on seniors said it looked ‘Ally’ (Swear he was trying to Wah me)

I have found that due to the helmet cover being stretched over the edge of the helmet it doesn’t take that long before it starts to fray. So it reduces the wear and tear on the helmet cover.

Also when you are a Tom it prevents the tell tail sign of sleeping in an ambush, as it stops the rim just above your SUSAT wearing out.

(So I've been told as I would never do such a thing!)

The worse thing is when you get the bone ‘You shouldn’t do that because” comments from mongs. I’ve been to a few places in the world and it has worked for me.
 

Cutaway

LE
Kit Reviewer
#20
putteesinmyhands said:
...

(and yes, I know helmets aren't made of toughened glass, but the principle is the same).
Aye, if helmets were made of a very brittle material.
As they're not - it's not.
 
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