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#996172 - 09/05/17 01:15 AM The Effects Of UV Rays On Motorcycle Gear and Our Health
moshe_levy Offline
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Registered: 07/05/06
Posts: 4384
Loc: NJ - God Help Me
All-

I'm going to get a bit more scientific than usual in this new video, as we delve into the subject of Ultraviolet Radiation's effect on our riding gear and on our health. It's a subject that doesn't get nearly as much attention as it should! Tune in for objective Ultraviolet Protection Factor and Accelerated UV Aging tests on leading products from Aerostich, BMW, and Scorpion.

https://www.youtube.com/watch?v=OrjyrZgQMOI

-MKL
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2015 BMW R1200RT-LC
2013 Moto Guzzi V7 Racer
1987 Yamaha YSR50
1973 BMW R75/5
"Lihiyot am chofshi b'artzeinu..."
https://www.youtube.com/c/motomouthmoshe

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#996179 - 09/05/17 02:21 AM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: moshe_levy]
Green RT Offline
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Registered: 11/23/03
Posts: 1550
Loc: Guadalajara, México
I would also be interested in knowing what UV exposure does to helmets. Do they degrade over time. Probably yes, but how much. When to they need to be replaced. There is a fair amount of discussion of this on Motorcycle forums, but I found little hard data. In particular, I am curious about the effect of UV on the shell, rather than the effect of sweat and time on the lining. Damage to the padding seems more obvious. It compacts and can get crumbly. But damage to the shell from UV would be less visible.
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Will

2015 R1200R Cordoba Blue (current)
1999 R1100RT Tundra Green
1987 R100RT Grey
1970 R60/5 Black w/white pin stripes
196? Honda 305 Super Hawk
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#996183 - 09/05/17 03:59 AM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: moshe_levy]
fastlarry Online
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Registered: 05/28/02
Posts: 271
Loc: Southern Ohio

will helmet visors pass UVA radiation?
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Larry
2016 BMW R1200RT

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#996220 - 09/05/17 08:50 PM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: moshe_levy]
moshe_levy Offline
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Registered: 07/05/06
Posts: 4384
Loc: NJ - God Help Me
My helmets (currently Shoei and Arai) both say that the visors block 99.9% of UV. So I take that to mean that they basically block UV like a good set of sunglasses do.

-MKL
_________________________
http://www.mklsportster.com/
2015 BMW R1200RT-LC
2013 Moto Guzzi V7 Racer
1987 Yamaha YSR50
1973 BMW R75/5
"Lihiyot am chofshi b'artzeinu..."
https://www.youtube.com/c/motomouthmoshe

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#996800 - 09/13/17 06:05 PM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: fastlarry]
Joe Frickin' Friday Offline

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Registered: 07/28/00
Posts: 17552
Loc: Ann Arbor, MI (USA)
Originally Posted By: fastlarry

will helmet visors pass UVA radiation?


These are usually polycarbonate, which means two things:

1) Polycarbonate itself does not transmit UV.

2) Polycarbonate is damaged by UV, so polycarbonate items designed for outdoor use typically comes with a UV-protective coating (I'm now wondering whether the yellowing/frosting on the outer surface of plastic headlight lenses happens over time as the protective coating is eroded by tens of thousands of miles of sandblasting, leaving bare polycarbonate to be attacked by UV). So your eyeballs are very well-protected behind UV-proof polycarbonate and a layer of UV-proof coating on top of that polycarbonate.

Originally Posted By: Green RT
I would also be interested in knowing what UV exposure does to helmets. Do they degrade over time. Probably yes, but how much. When to they need to be replaced. There is a fair amount of discussion of this on Motorcycle forums, but I found little hard data. In particular, I am curious about the effect of UV on the shell, rather than the effect of sweat and time on the lining. Damage to the padding seems more obvious. It compacts and can get crumbly. But damage to the shell from UV would be less visible.


I will speculate that a motorcycle helmet's structural integrity is not significantly affected by ambient UV exposure. Shoei's shell construction process, for example, starts with a molded fiberglass shell, which is then covered with paint and/or graphics. It seems to me you'd have to remove all of that paint/graphics before UV could even begin to attack the structural shell.

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#996864 - 09/14/17 02:25 PM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: Joe Frickin' Friday]
Green RT Offline
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Registered: 11/23/03
Posts: 1550
Loc: Guadalajara, México
So I can stop worrying about whether my 20 year old helmet still works. Thanks.
_________________________
Will

2015 R1200R Cordoba Blue (current)
1999 R1100RT Tundra Green
1987 R100RT Grey
1970 R60/5 Black w/white pin stripes
196? Honda 305 Super Hawk
195? Sears Allstate 50 cc Moped

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#996868 - 09/14/17 03:16 PM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: Green RT]
Joe Frickin' Friday Offline

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Registered: 07/28/00
Posts: 17552
Loc: Ann Arbor, MI (USA)
Originally Posted By: Green RT
So I can stop worrying about whether my 20 year old helmet still works. Thanks.


At least as regards the shell and UV damage; I doubt that a helmet that racks up 100,000 miles of use over five years in sunny southern California sustains more UV damage than one with just 10,000 miles of use over the same time period in, say, Scotland.

But in my experience, helmets inevitably get dropped and bumped, which can damage the shell and compromise the Styrofoam liner's ability to protect against future impacts. The chin strap and its anchor points and at the buckle also may wear/fret, and exposure to skin secretions and atmospheric oxygen may compromise its overall material strength. The standard "replace after five years no matter what" guideline may be overkill (I'm at 9 years on my current helmet), but it seems to me that 20 years is probably pushing it. If nothing else, I would think that safety technology has probably improved significantly during in the past two decades, and by replacing your 20YO helmet, you might provide yourself with an increased margin of safety.

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#996918 - 09/15/17 02:31 AM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: moshe_levy]
beemerman2k Offline
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Registered: 07/19/00
Posts: 7064
Loc: Ellington, CT
Excellent presentation, Moshe! Thanks!
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beemerman2k
'00 R1100RT Opal Blue Metallic
<11 year haitus from motorcycling cry >
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#997163 - 09/18/17 02:18 AM Re: The Effects Of UV Rays On Motorcycle Gear and Our Health [Re: moshe_levy]
moshe_levy Offline
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Registered: 07/05/06
Posts: 4384
Loc: NJ - God Help Me
Thanks
_________________________
http://www.mklsportster.com/
2015 BMW R1200RT-LC
2013 Moto Guzzi V7 Racer
1987 Yamaha YSR50
1973 BMW R75/5
"Lihiyot am chofshi b'artzeinu..."
https://www.youtube.com/c/motomouthmoshe

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