Head injuries aren't that common, so it's fairly safe to ride without a helmet.
But it's safer to use one.
And dependning on where you are, it might be legally required.
The laws for helmets and bicycle riding can be different from place to place, so w/o knowing where you are the question can't be properly answered.
Some places, you are free to choose when you're 15. Other places require all riders of all ages to wear helmets
No, it's not illegal not to ride without a helmet.
But somehow I suspect that's not what you actually meant to ask about.
yes because if you don't you can hurt your self
If you hit your head, all the force of the impact will go straight in with nothing to absorb it or spread it out.
It is totally stupid to ride karts anywhere without a helmet, legal or not.
you have to wear a helmet whenever you ride a bike or you will be fined
It is not illegal to ride a two or three wheeled motor vehicle without a helmet but some form of eye protection is required. On a Bike it is illegal to ride a bicycle without a helmet if you are under 16.
Helmets can only protect your head. so if your balls get hit the helmet does not protect them.
No, it is illegal to ride a dirt bike on the street but you can ride it on a trail or dirt bike track.
Its illegal to ride bike on side walks. But if you want to, then you can ride but slowly taking care of pedestrians.
As far as I am aware, in most if not all countries, it is illegal to ride a horse without a helmet. (Unless with special permission.)
Can happen. Some places have a law stating that you must have a helmet to ride a bike. If you haven't, you might be stopped by the police and given a ticket.
no
Can - sure. But it will increase the risk of head injuries a little, and in some places wearing a helmet while riding is a legal requirement.
To ride a pocket bike in Utah you need to meet a certain criteria. You should be at least 16 to 17 years and wear a helmet.
Depends on the state you are riding in. For example, here in indiana its legal to ride without a helmet. But if you are riding and you cross over to Ohio you need to wear a hemet. You will be fined. Furthermore, it is very dangerous, because if you fall off your bike or crash into something it is likely that you hurt your head seriously.