10 Best Giro Bicycle Helmets 2025 in the United States

The Giro Aries Spherical Bike Helmet in Matte White (Large) is designed with both performance and safety in mind. Fit-wise, it is adjustable, ensuring a secure and comfortable fit for adults. The helmet incorporates the proprietary AURA II Reinforcement Arch, which provides structural integrity without adding unnecessary weight. This contributes to its relatively light weight of 10 ounces, making it comfortable for long rides.

In terms of ventilation, the Aries excels with deep internal channels connecting massive front and rear vents, allowing excellent airflow to keep the rider cool. Additionally, the DryCore sweat management system effectively redirects sweat to reduce discomfort during intense activities. Safety is a top priority with this helmet, featuring Spherical Technology powered by MIPS, which helps redirect impact forces and reduce the risk of injury. The Progressive Layering of EPS foam addresses a wide range of impact energies, offering enhanced protection.

The helmet's streamlined design also reduces aerodynamic drag by 4% over previous models, contributing to faster speeds. Potential drawbacks include its higher price point and the fact that some users may find the adjustment mechanism slightly fiddly. However, with a high customer rating of 4.6 out of 5 stars, it is well-regarded for its comfort, safety, and innovative features, making it ideal for serious cyclists looking for a high-performance helmet.

The Giro Helios Spherical helmet offers a solid option for adult cyclists seeking a balance of comfort, safety, and ventilation. Its standout feature is the Spherical Technology powered by MIPS, which is designed to improve impact protection by allowing the inner liner to move independently from the outer shell, reducing rotational forces during a crash. The helmet weighs 270 grams for the medium size, making it lightweight and comfortable for longer rides. It features 15 wind tunnel vents with internal channeling, which help keep your head cool even during intense cycling sessions.

The Roc Loc 5 Air Fit System offers an adjustable fit, allowing you to customize how snugly it sits, which is essential for both comfort and safety. This helmet meets key safety standards, including the US CPSC and European CE EN1078 certifications, so it adheres to recognized protection requirements. The polycarbonate shell with hardbody lower shell construction adds durability without too much bulk.

The helmet’s design focuses on ventilation and impact management, though it may feel a bit pricier compared to basic helmets without these advanced features. Also, it’s labeled as a small size here, so make sure to check sizing carefully to ensure a proper fit. This makes the Giro Helios Spherical well-suited for cyclists who prioritize strong safety technology and comfort, particularly those riding frequently or in warmer conditions, but it might be more than casual riders need.

The Giro Manifest Spherical Cycling Helmet is designed with a strong focus on safety and comfort for adult male cyclists. Its standout feature is the advanced Spherical technology combined with MIPS, which helps reduce rotational forces during impacts. This adds an extra layer of protection beyond regular helmets and is especially valuable for riders concerned about head safety. The helmet uses a dual-density EPS foam liner that addresses both high and low-speed impacts, meaning it manages energy from crashes more effectively.

Fit-wise, the helmet comes in a Small size with integrated eyewear grippers to keep glasses secure, which is handy for riders who wear sunglasses or prescription glasses. Weighing just 8 ounces, it’s lightweight, which helps reduce neck strain on longer rides.

Ventilation is excellent thanks to 19 wind tunnel vents and internal channels that promote airflow, keeping the rider cool even on hot days. The helmet’s shell is made of durable polycarbonate fused to the liner, making it tough without adding unnecessary weight. For cyclists prioritizing safety with advanced impact protection and wanting a well-ventilated, lightweight helmet, the Giro Manifest Spherical is a strong choice.