10 Best Mountain Bike Helmets 2026 in the United States

The Troy Lee Designs A3 MIPS Helmet is a solid choice for mountain bikers seeking top-level protection and comfort. It comes in a Medium-Large size with an adjustable fit, making it suitable for most adult riders. Ventilation is excellent thanks to 16 vents, which is among the best for half-shell helmets, helping to keep your head cool on long or intense rides. The helmet uses a combination of EPP and EPS foam to absorb impacts of different speeds, paired with MIPS technology for added brain protection from rotational forces. This means it meets high safety standards and offers peace of mind on rough trails.

The FIDLOCK magnetic buckle is easy to use and secure, improving the retention system over traditional straps. A standout feature is the 3-Way Magnajust visor, which allows quick adjustments to block sun or debris without hassle. Although the helmet weighs around 1.23 kilograms, it remains comfortable thanks to a soft comfort liner and thoughtful design. The included breathable mesh bag and three-year warranty add extra value.

Some riders might find the price on the higher side, but its combination of safety, ventilation, and fit makes it a worthwhile investment for serious mountain biking enthusiasts who want a durable and well-made helmet.

The POC Kortal Race MIPS helmet is designed specifically for mountain biking disciplines such as trail and enduro, offering good protection and comfort for serious riders. It comes in larger sizes (XL-XXL), so it fits adults with bigger heads well. The helmet is relatively lightweight at about 0.47 kg, which helps reduce neck strain on longer rides. Ventilation is a strong point here, with an efficient design to keep air flowing and help you stay cool during intense efforts. Safety is well covered thanks to the built-in MIPS system, which reduces rotational impacts in crashes, plus it meets recognized safety standards including NTA 8776.

The retention system is adjustable and includes a lightweight strap for a secure fit. The adjustable visor is practical, allowing you to lift it when you want to store goggles or sunglasses underneath. Additional features like the integrated RECCO reflector help rescuers locate you if needed, and an NFC medical ID stores important health info accessible in emergencies.

On the downside, the helmet is mainly available in XL-XXL, so it may not fit smaller heads. Also, while ventilation is good, some riders might find it less extensive compared to helmets with more vents. This helmet is well suited for mountain bikers looking for solid protection combined with thoughtful extras for safety and convenience on challenging rides.

The Giro Fixture II MIPS helmet is a solid choice for mountain bikers looking for reliable protection and comfort. It features MIPS technology, which helps reduce rotational forces during impacts, enhancing safety on rough trails. The helmet’s fit is designed to cover a wide range of head sizes (54–61 cm) with an adjustable system that offers a secure and comfortable feel right out of the box, making it suitable for most adults and even teens. Weighing just 10 ounces, it is lightweight enough to stay comfortable over long rides without feeling bulky.

Ventilation is a strong point here, with 18 vents and internal channels that keep airflow steady, helping riders stay cool even on hot days. The helmet’s rugged in-mold construction means it combines a hard outer shell with a shock-absorbing inner layer, adding durability without extra weight. While it doesn’t mention a visor, which some mountain bikers find helpful for sun and debris protection, the other features are well balanced. For those prioritizing safety with modern impact protection, lightweight comfort, and good ventilation in one package, this helmet stands out as a dependable option.