An illustration of people wearing bike helmets while riding their bicycles.

Now that spring is here, more people are dusting off their bicycles, putting air in the tires, and getting ready to go out for a spin.

And whether you’re commuting to work, hitting a rail trail, or just tooling around the neighborhood, experts agree: If you’re getting on a bike, put on a helmet first. In the event of an accident, a helmet dramatically reduces your risk of head injury and death.

Helmets are important for everyone, but especially for kids—in fact, wearing a helmet is the law for kids in 21 states and the District of Columbia, according to the Bicycle Helmet Safety Institute. Some cities and towns, including Seattle, mandate helmets for adult riders, too.

All the helmets in our ratings are rigorously evaluated in the lab and on the road by our expert testers.

To test how well a helmet will absorb an impact, it is strapped onto a head form and dropped from 2 meters in the air onto a steel anvil—at a speed of about 14 mph. (This test is performed four times, to simulate what would happen if a cyclist fell and hit his or her head on the front, the side, the rear, or the crown.)

Our testers also ride around wearing each helmet to see how well it ventilates the head during real-world use, and examine the features, versatility, and ease of use of all the buckles and adjustments.

Remember, if you’ve fallen and hit your head while wearing a helmet, it’s time to get a new one. Here are our top picks for adults and kids, in alphabetical order. We also note below which helmets come with a Multi-directional Impact Protection System (MIPS) liner, which is designed to reduce the risk of a concussion.

Best Bike Helmets for Adults


Cannondale CAAD MIPS

    This full-featured helmet gets top marks for impact absorption, and it comes with bells and whistles: reflective features to make nighttime riding safer, a dial to quickly adjust the fit, and MIPS technology.


    Giro Register

      This CR Best Buy is top-rated for impact absorption. It comes with a one-year warranty and is part of a one-year damage replacement program. It has a dial to help adjust the fit, and it earns an Excellent score for ventilation, which means you’ll stay cool during long rides. 


      Giro Register MIPS

        This helmet has all the benefits of the Giro Register, with one added feature: MIPS technology. While that makes this model about 1⁄2 ounce heavier than the standard Giro Register, it also gives you added protection from the type of impact that often causes concussions.


        Scott Arx Plus

          This model is the most lightweight of our top picks—great if you’re looking for a helmet to take on the go—but it still earns an Excellent score on impact absorption, with the added benefit of MIPS technology baked in. It also has a dial to help adjust how snug it is, and it’s easy and intuitive to get a good fit for your head.

          Best Bike Helmets for Kids


          Bell Sidetrack MIPS

            This full-featured helmet comes in array of bright colors and patterns, with a snap-on visor, buckles designed to prevent pinching, and a dial to help adjust the fit. It also gets top marks for impact absorption, has MIPS technology built in, and comes with a one-year warranty. 


            Garneau Nino

              This helmet gets top marks for impact absorption and comes with a one-year warranty. A dial makes it easy to adjust the fit, and reflective stickers improve nighttime visibility. Plus, a bonus for parents: The padding is washable. 


              Lazer Nut'Z

                This helmet earns a Very Good score for impact absorption, and while it comes in only one size—like our other best-rated kids’ helmets—it’s easy to make fit adjustments. The buckles are designed to prevent pinching. Among our kids’ picks, this is the heaviest helmet. It also comes in a MIPS version, which is not included in our ratings.


                Uvex Quatro Junior

                  This helmet gets top marks for impact absorption and comes packed with cool features: a button to release the buckle with one hand, a dial to adjust the fit, and reflective elements to increase nighttime visibility. Our testers found that the ventilation on this helmet was not as good as on other top picks, so it might not be the best choice for muggy summer days. It comes with a one-year warranty.