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Helmets? Rather MIP tech evolution opinions?
 

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

5/30/20 10:47 AM

Helmets? Rather MIP tech evolution opinions?

Specifically, Bontrager Wave Cell VS my very old tech Smith MIPs Overtake.

More 'better mouse traps'?

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dan emery
Joined: 11 Jan 2004
Posts: 6402
Location: Maine

5/30/20 2:32 PM

Wave cell

I bought a wave cell a few weeks ago. It is a little heavier than other helmets Ive used, but not bothersome. It has a good fit adjustment. I concluded it was a good helmet regarding safety but whether its better than competitors I have no idea. The Team Segafredo decals, which match my bike, weighed heavily in its favor.

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4652
Location: Nashua, NH

5/30/20 4:10 PM

Sparky, go here: https://helmets.org/
There's a lot of unbiased information here, as they have no dog in the technology fight. They delve into various technologies and explain their pros and cons. Among other things, you'll find a rather compelling explanation of why MIPS may be largely "smoke and mirrors", due to the completely unrealistic testing protocol they use.

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

5/30/20 4:20 PM

Thanks Brian, of course first thing I saw on the page was something that had not occurred to me:

https://helmets.org/clean.htm#covid19


Dan, I read that about them on the weight. Was wondering bout that...

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lrzipris
Joined: 04 Mar 2004
Posts: 500
Location: Doylestown, PA

5/30/20 5:52 PM

There was this brief discussion about a year ago: http://www.cyclingforum.com/phpBB2/viewtopic.php?p=164161&highlight=mips#164161

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

5/30/20 8:12 PM

I think that was when I had just grabbed the Overtake.

I was concerned about the MIPS mesh not venting well for hot temps. Has not been the case, although I do not have an insulating layer of hair.. What I have left back/sides of my head gets crewcut/buzzed regularly.

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dan emery
Joined: 11 Jan 2004
Posts: 6402
Location: Maine

6/5/20 6:30 AM

heated opinion

Took a ride yesterday, 80 and fairly humid. Didn't even think about heat/sweat from the helmet, so I think the Wave Cell, though a bit heavy, ventilates well.

Also had the new Rene Herse hot weather jersey allegedly made from plastic bottles washed up on Mediterranean beaches. BY FAR the best hot weather jersey I've worn. Expensive but worth it to me.

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greglepore
Joined: 10 Jan 2004
Posts: 1683
Location: SE Pa, USA

6/5/20 7:55 AM

I had an overtake or something similar from Smith. I think their Koroyd is fine as mips, and it tests ok in the va tech tests, but I personally found it too warm in Va humidity. If you're ok with the ventilation, I don't know that the wavecell is all that much better.

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

6/5/20 10:00 AM

"but I personally found it too warm in Va humidity."

Sounds like you may still possibly possess an insulating hair layer. I suspect my Overtake would be too hot if I also possessed said insulating layer.

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4652
Location: Nashua, NH

6/5/20 4:02 PM

Human hair has virtually no insulating value, though I guess it can block airflow through a helmet. Regardless, heat tolerance is a very personal thing.

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

6/5/20 5:33 PM

"no insulating value"

Assuming like fiberglass strands, it is the air in the matrix doing the actual insulating, semantics not withstanding.

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4652
Location: Nashua, NH

6/6/20 4:59 AM

That's the way all insulation works, from hollow deer hair to Aerogel. It's all about trapping and/or slowing the movement of air, or sometimes other gasses like nitrogen, which is used in making neoprene.

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

6/6/20 10:38 AM

End result as it applies to insulating, my point about my not having said insulating layer stands.

Where there is hair can get thick and provide for insulating effect, except it is never longer than 1/2" at worst.

When I first got the Overtake, I'd tilt my head down t see if I felt more flow. Considering the openings are like a deep honeycomb. The tubes of openings are radial from your head, so putting the top of your head down should align the 'tubes' with what your are riding into. In my minds eye I expected to feel the evaporation cooling effect of that air more with my head down but never noticed a difference.

I know I have not had hitch hikers nor got stung on the head, bees can't pass thru. Not that this happened more than once every other year or so.

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greglepore
Joined: 10 Jan 2004
Posts: 1683
Location: SE Pa, USA

6/6/20 1:39 PM

At the time I did have hair. Now I have a covid buzz. Gave the helmet to my s/o so can't do a test. lol

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4652
Location: Nashua, NH

6/6/20 4:47 PM

If I gave Linda one of my helmets, it would fit about like this:

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dan emery
Joined: 11 Jan 2004
Posts: 6402
Location: Maine

6/6/20 5:35 PM

Complete info

Since I posted an opinion on ventilation, I should clarify that I still have hair. After my recent long delayed cut, the stylist commented Got rid of that Bozo hair, huh?

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lrzipris
Joined: 04 Mar 2004
Posts: 500
Location: Doylestown, PA

6/11/20 6:16 AM

Sparky, I just saw this through a link on RBR; anything here of help to you?

https://www.velonews.com/gear/swedish-group-tests-27-helmets-to-determine-the-safest-for-cyclists/

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

6/11/20 11:22 AM

Not sure one way or the other. I do not know the rep of the publisher as it pertains to marketing shilling etc..

Although "test was conducted by Swedish insurance company Folksam and funded through a grant by the Road Safety Trust, a United Kingdom-based group that funds road safety" seems encouraging certainly. ;)


Render a better answer after weeding thru the PDF link,

https://static1.squarespace.com/static/5d0a03b295f37b00018da721/t/5ed69dd223ccb508fbc5c34f/1591123417043/Bicycle+Helmets+2020+Report+FINAL+MAY+2020.pdf

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Sparky
Joined: 08 Dec 2003
Posts: 17797
Location: Portland, OR

6/11/20 12:00 PM

Like to see [if exists] previous data that might include some rating data of what I am actually wearing. ;)

There is no doubt I am doing a big assume that my Smith Overtake is good just based on it being MIPS.

But OTOH, it should be better than the previous older ones I decided to move forward in tech form. If my 180.00 Giro had not got walked away when I left it next to the car... it was getting old, so better it is gone?

I have two of those ultra light Giros that are on a self now that the Overtake is what I use al the time...

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