nick burns

CF roll cage ftw.

BarracksSi

Too hot, too heavy, unable to hear as much, etc. I'll settle for a rounder-shaped bike helmet with rear coverage that's deeper than normal; usually MTB-marketed helmets fit this style.

JanMM

I don't buy the premise that bicycle helmets aren't effective in preventing most head injuries.

al-wagner

no

KingTermite 

Way too heavy.....you would have a whole new balance to adjust to.

hairlessbill

Also takes away from your peripheral vision unless you wear a non full-face helmet.

Jeffbeerman2

https://www.ribcap.ca/en/productsrib....subcat=4&id=87

CommuterRun

Too hot, comparatively poor ventilation, potentially leading to heat injuries.
Too heavy, possibly contributing to neck and spinal injuries.
Reduced peripheral vision.
Reduced ability to hear, particularly from the rear.
More expensive.

No, I would not wear one. Not even if they were free.

The Bell Metro (Citi) fits this description. I have one and have to say that it's the first helmet I have had that I truly like. But truth be told, I usually only wear it at night (which is every commute to work) because it makes a convenient place to mount my helmet light and a tertiary taillight. Otherwise I wear a ballcap, depending on which style bike I'm on.

BarracksSi

I've got one of those, too. I also have a Giro Xen that I use most of the time; I've usually got the Metro with its rain cover snapped on.

charles vail

I wouldn't wear a motorcycle helmet, my neck would spasm in a couple of miles. I don't even wear a bicycle helmet all that often. I don't ride much faster than I can run and I use my brakes on hills when I get going too fast, unless I have a good surface and no traffic. I average 15 mph on most rides and that doesn't seem fast enough to make a helmet necessary. If I get hit by an auto I figure a helmet won't help much either way.

aMull

Never, absolutely pointless. It's called a motorcycle helmet for a reason.

Treespeed

A motorcycle helmet gets hot just standing still and I can barely stand my super vented Bell in the summer, this would be a bad idea.

roseskunk

i only wear my motorcycle helmet jogging... and in the car of course.

tjspiel

The one collision I had with a car and the couple near misses were when the auto was traveling at low speed (turning, pulling out, etc). Bike helmets are a good thing. Your head hitting the pavement at 15 mph is plenty fast enough to do serious damage. We had a friend who forgot her helmet one day when she took her bike to her favorite (paved) trails. She fell and hit her head. She was out cold. Doesn't even remember how she crashed. Ended up missing a couple of weeks of work and is very lucky she's not going to have permanent damage. My guess is that she was going < 15 mph.

option.iv

Probably not. It'd look goofy for one, and it's way too bulky. Also would impare my vision somewhat, requiring mirrors and such. And yeah, sounds like I would generate a lot of sweat like many others have stated. Maybe you're asking to get in a crash, but I try my best to avoid them, so a normal bicycle helmet would be most efficient.

charles vail

Guess I better slow down my running then.....or wear a helmet when doing that too.

bikertrash

If your riding ability sucks to the point that you even consider a full face motorcycle helmet, do society a favor and walk.

Stax

DataJunkie

You would need the rest of the outfit to go with that one.
Imagine tights, cycling jersey, and a boba fett helmet.
One could alternate between Darth Vader as well.

flipped4bikes

No. The biggest helmet I might wear for bicycling would be a full face freeriding/downhill helmet. And I think that's overkill.

tjspiel

Sorry, I don't put much stock in the "I bike only as fast as I can run therefore I don't need a helmet" argument.

1. Crashing a bike is NOT the same as tripping over a root
2. Anybody who AVERAGES 15 mph running down a bike lane for 7 MILES should be wearing a helmet too.

Most people I know are lucky to top 10 to 15 mph running, couldn't manage to sustain it for more than a few seconds and are on grass while they're doing it.

Sir Bikesalot

I also had this in mind when I posted:

https://www.bikeforums.net/advocacy-safety/369980-must-read.html

Mainly tells of how very experienced cyclists were hit by inattentive or drunk drivers. There was nothing they could to avoid the collisions and they mostly ended up dead or with massive head/neck/spine injuries. I'm thinking that even though there's nothing we could do to prevent being hit, there might be something we could do to minimize the injury.

But I think the consensus is clear. Motorcycle helmets in their current form would be too bulky and hot to wear on a consistent basis. What we really need is a much better cycling-oriented helmet, like the Giro Xen for example. From personal experience I've found skating helmets (pro-tec, triple 8, etc.) to be vastly superior to cycling helmets in minimizing head injury. I fell very badly many times while skating where the only part of my body not hurt was my head and neck. The difference is the very thick elastomeric padding inside skate helmets that absorb most of the impact. Contrast to cycling helmets that are rock hard (in order to support multiple vents) and transfer quite a bit of momentum to the head before crushing. Motorcycle helmets are more similar to skate helmets in this regard, with softer padding inside surrounded by a hard shell.

I think I'll probably end up going with the very best ventilated skate helmet I can find.

SDRider

Motorcycle helmets aren't so heavy that you'll be risking neck injury but they do fit very snug and encompass your entire head. This would be very uncomfortable for someone riding a bicycle not to mention the hearing impairment.

I have a Shoei RF1000 I wear when I ride my motorcycle but there is no way I'd be even remotely comfortable wearing it on a bicycle. I wore it once during a go-kart race and was sweating inside the helmet after just a few laps muscling a go-kart around the track (these karts do over 40 mph and have racing harnesses and helmets are mandatory). Not to mention this particular helmet costs $350...I can't imagine the smell inside after only a few rides. Also, the visor is prone to fogging in cooler air when you're not moving so if you were sweating inside it you'd probably always have problems with it fogging up.

I'll stick with my Bell Sweep R.

mconlonx

I dunno about skate helmets, but moto helmets are NOT just "elastomeric padding" inside a hard shell. Between the foam rubber used for fit inside the helmet and the outer, hard layer, there's a layer of the same expanded foam that makes up bicycle helmets. This deforms when crashed and provides the bulk of impact absorbtion in the event of a motorcycle crash, not the soft foam used on the inside of the helmet for fit.

Everyone already mentioned the reasons, but tops for not using a moto helmet:
1. Heat (or in the Winter, fogging of full face shield)
2. Weight
3. Loss of peripheral vision
4. Loss of hearing

However. There's this padding used in some moto armor that is soft and pliable, but on impact, stiffens up. Not sure the impact absorbtion ability is to the point that it could be used in helmets, but I'd buy something with that stuff in it, that was certified to at least the same minimums as regular helmets, in the form of the old leather hairnets. Muy retro!

mtnbk3000

no it wouldn't because you would not be able to breathe. Unless motorcycle helmets are more breathable than fullface bike helmets, i have to take mine off every couple of minutes to catch my breath