What a helmet is for
A helmet is designed to reduce the force reaching the head in certain kinds of impact by crushing or deforming and spreading the load. It does not make a rider invulnerable, it will not protect against every kind of injury, and it works best when it is the right size and worn correctly. Even so, a properly fitted helmet is one of the most widely recommended pieces of protection for cycling, and it matters even more when practising skills that raise the chance of a fall.
Rules about helmet use differ between countries, regions and ages, so check what applies where you ride. This article is general information, and does not name brands or give prices.
Main types of helmet
Helmets are usually grouped by the kind of riding they suit. The labels are loose, and there is overlap.
Road and general cycling helmets. These are typically light, well ventilated and shaped for riding on paved surfaces. Many have a lot of vents, a smooth outer shell and a retention system that adjusts at the back.
Urban and commuter helmets. Often a little more coverage and a more everyday look, sometimes with a visor, integrated light or reflective details. Comfort and visibility are the main selling points.
Mountain bike helmets. These tend to extend further down the back of the head and the temples and often have a visor to shield against sun and branches. Some riders choose them for general skills practice because of the extra coverage.
Skate-style or multi-impact helmets. These have a harder outer shell and are common among freestyle and BMX riders. Some are designed to cope with several light impacts. Always check what the maker says about the helmet’s intended use and about replacing it after a hit.
Full-face helmets. These add a chin bar and are used for downhill and some freeride and bike park riding, where the risk of face and jaw injury is higher. They are heavier and warmer, and for ordinary beginner practice they are usually not needed.
Smart helmets. Some have lights, indicators or built-in communication. If you are curious, the article on the smart bike helmet looks at what they add, but the safety basics of fit and standards still come first.
Look for a recognised safety standard
Helmets for sale in a given country usually have to meet a national or regional safety standard, and the label or sticker is normally found inside the helmet or on the packaging. Standards differ by region and by the type of helmet, and they do not all test for the same thing, so the right approach is:
- Look for a label naming a recognised standard that applies where you live and ride.
- Check that the standard suits your type of riding, for example a bike helmet rather than a general sports helmet.
- Be cautious of helmets with no markings, doubtful labels or very cheap novelty designs that are only for show.
- Read the instructions and information that come with the helmet.
A label tells you that the helmet passed a minimum test. It does not rank helmets against each other, and a higher price does not automatically mean better protection.
Judging fit
Fit matters as much as the type. A helmet that is loose, tilted or too small will not do its job well. These are the commonly recommended checks, but always follow the maker’s own instructions.
- Measure and try on. Helmets are sized by head circumference, and shapes vary between makes. Trying several is often the quickest way to find the one that suits your head. If you buy online, check the return policy.
- Check that it sits level. The helmet should sit low on the forehead, covering the top of the head rather than perched on the back. A common description is that it should sit about a finger or two above the eyebrows, though the exact distance varies.
- Adjust the dial or retention system. The helmet should feel snug all round without causing pressure points. When you shake your head, the helmet should move with you rather than slide about.
- Fasten the straps. The side straps should form a V around each ear and meet just below it. The chin strap should be snug, with room for only a finger or so beneath the chin. Opening your mouth wide should pull the helmet down slightly.
- Test it. Push the helmet back and forth and side to side. It should not slide far over your eyes or tip back to expose the forehead.
More detail on getting the strap and position right appears in the guidance on bike helmet fit tips. Take your time, and adjust whenever you wear a different hat, a buff or different hairstyle.
Comfort and practical features
A helmet that is uncomfortable tends to be left at home. Consider:
- Ventilation, especially in warm weather.
- Weight, which matters more on long rides.
- Padding that is removable and washable.
- A visor, if you want sun or rain protection.
- Compatibility with glasses.
- Reflective or bright colours, which can help others see you, although lights are more important in the dark.
Children and teens
Children need a helmet made for their size, and fit matters even more because heads grow. Use general principles: buy a helmet that fits now rather than one to grow into, check the maker’s guidance on age and size, and follow local laws. Toddlers and babies have their own issues, and manufacturer advice on when a child can wear a helmet should be followed.
Care and replacement
- Store the helmet away from heat, chemicals and direct sun for long periods, which can degrade materials.
- Do not drill, paint or stick things on it unless the maker allows it.
- Replace a helmet after a significant impact. Details are in the article on when to replace a helmet after a fall.
- Manufacturers often give a suggested service life, so check the instructions for your helmet.
A short checklist
- Does it carry a recognised safety standard label for your country and type of riding?
- Is it the right shape and size for your head?
- Does it sit level, stay put when you shake your head, and have snug, correctly placed straps?
- Is it comfortable enough to wear every time?
- Is it the right style for your riding?
A helmet is only one part of staying safe. Choosing protective gear for knees, elbows and hands, riding within your ability and checking your bike regularly all matter as well.