10 Best Mountain Bike Helmets 2025 in the United States

The Giro Fixture MIPS Adult Mountain Cycling Helmet is designed for a diverse range of cyclists, providing a reliable option for those seeking safety and comfort on the trails. One of its standout features is the integrated MIPS technology, which helps reduce rotational forces during impacts, enhancing protection in case of a crash. The helmet is engineered in Giro's advanced testing lab, reinforcing its commitment to safety standards, making it a highly trusted choice.

Fit and size are well addressed with the universal sizing that accommodates a wide range of head sizes (54-61 cm), allowing for a comfortable and secure fit right out of the box. The retention system is user-friendly, ensuring the helmet stays in place during rides. Additionally, the helmet features 18 Wind Tunnel vents, which provide excellent ventilation, keeping your head cool even on warm days.

While the in-molding construction adds to the helmet's durability, it also contributes to a slightly heavier weight compared to competing models, which may not appeal to those who prioritize ultralight gear for racing. The visor is included, which is great for sun protection, but it is not adjustable, limiting customization based on rider preferences.

The Schwinn Thrasher Bike Helmet is designed for adults aged 14 and above, with a suggested fit range of 58-62 cm, making it suitable for a wide range of head sizes. The helmet is lightweight, thanks to its two microshell layers and full-coverage EPS foam construction, which also provides durability. The easy-adjust dial system and adjustable side and chin straps ensure a snug and comfortable fit, assisted by full-range padding that enhances comfort during rides.

The helmet also features 21 flow vents, which provide excellent ventilation to keep you cool during long rides. Additionally, the moisture-wicking pads help to keep you dry. The detachable visor is a nice addition, offering shade and reducing glare, making it suitable for sunny conditions. Safety-wise, the helmet complies with the U.S. CPSC Safety Standard for Bicycle Helmets, ensuring it meets important protection criteria.

Although the helmet lacks MIPS (Multi-directional Impact Protection System) technology, which provides additional protection against rotational forces during impacts, it does come with a limited lifetime warranty, providing peace of mind. Given its comfort, ventilation, and adjustable features, the Schwinn Thrasher is ideal for casual cyclists and those looking for a reliable, everyday helmet. However, for those seeking advanced safety features like MIPS, they might need to consider other options.

The Fox Racing Speedframe Mountain Bike Helmet in Medium size is a solid choice for adult cyclists. It features a polycarbonate shell and dual-density Varizorb EPS impact foam for comprehensive protection. The helmet also includes an XT2 liner, which is known for its antimicrobial properties, ensuring hygiene and comfort during use. The 360 Fit System and Fidlock SNAP provide easy and precise adjustment for a snug fit.

This helmet is optimized for ventilation, which is critical for comfort during long rides. Its weight is relatively light at 2 pounds, making it less cumbersome while riding. The 3-position adjustable visor is a great addition, allowing compatibility with goggles, which can be beneficial for varied riding conditions.

A notable highlight is the MIPS technology, which offers additional protection against rotational forces during impacts, enhancing safety. However, some users might find the weight slightly heavier compared to other helmets in the market, which could be a minor drawback for those who prioritize ultra-light gear. Despite this, the Fox Racing Speedframe is well-regarded for its balance of safety, comfort, and adjustability.