6 things to consider when buying a bike helmet

Tom's Guide

27-05-2025

If you're planning to start cycling more, you need one of the best bike helmets, it's as simple as that. The extra protection you get from a helmet can make all the difference in a crash, and some helmets can now even help to prevent collisions.
To get the inside track on everything you need to know about bike helmets, we spoke to Juan Garcia Mansilla, co-founder of UNIT 1, a company that makes smart bike helmets and other cycling accessories.
Here's what you need to consider when buying your bike helmet.
Price is an obvious place to start, because you might well have a budget available to spend on your bike helmet.
'Prices vary a lot,' says Mansilla. 'You'll find basic helmets starting around $30. More advanced options — those with better materials, more features, or higher safety certifications — can go up to $300 or more.
'In our case, smart helmets with integrated lighting, MIPS [Multi-directional Impact Protection System], crash alerts and other features usually fall in the $150–$230 range.'
Bike helmets have to hit certain safety standards depending on where you live, and this is the first thing you should check with any helmet you're considering, especially if you're looking at cheaper helmets.
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'In the U.S., the standard is CPSC,' says Mansilla. 'In Europe, it's EN-1078. Both were developed for traditional cycling speeds up to around 15.5 mph/25 km/h.
'For higher-impact protection, there's NTA-8776, a newer and more demanding certification created in the Netherlands, specifically with e-bikes and faster urban riding in mind.
'It tests for impacts up to 28 mph/ 45 km/h. No matter how fast you actually ride, a helmet that's NTA-certified offers a higher safety margin, full stop.
'For additional assurance, some riders also look to independent testing like the Virginia Tech Helmet Ratings, which assess real-world impact scenarios.'
Once you've found a helmet that fits your budget and the required safety standard, you need to make sure it's comfortable and fits well — if the helmet is loose, it will reduce how effective it is during impacts.
If you ride in hot countries, it's also worth making sure that the helmet has good airflow so it doesn't get uncomfortably sweaty during longer rides.
Helmets will work for all kinds of cycling, but there are different features you should prioritize depending on whether you're likely to be riding on the road or trails.
'Road cyclists typically look for something lightweight with maximum ventilation,' says Mansilla. 'Mountain bikers need more head coverage and durability. Urban helmets tend to be cleaner in design, with moderate airflow and visibility-focused features.
Technically, any helmet can work across contexts, but one that's built for your type of riding will always perform better.'
Bike helmets are getting smarter all the time, and if you have a bigger budget, you can get features that enhance your safety and ride experience.
'Our [UNIT 1's] helmets, for example, include integrated front and rear lights, turn signals, brake lights, a magnetic buckle for ease of use and crash alerts that send your location to an emergency contact if you fall,' says Mansilla.
'These tools are designed to help you avoid collisions and get help faster if one happens.'
This is something to consider after you've bought your helmet — when should you think about buying another one?
'After any crash, the helmet should be replaced, even if it looks fine,' says Mansilla. 'Impact can compromise the inner structure in ways you can't see.
'Without a crash, most helmets need to be replaced every three to four years, depending on use. UV exposure, rain, sweat and general wear all break down the materials over time.'