Head-to-head · Best Bike Helmets

Giro Aries Spherical vs Trek Starvos WaveCel Cycling Helmet

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Giro Aries Spherical comes out ahead by a clear margin (4.7 vs 4.1). The gap is mostly about serious cyclists seeking maximum performance — read the strengths below before deciding.

Higher ratedRanked #1 in Best Bike Helmets

Giro Aries Spherical

4.7

$349.95as of Jul 8

The Giro Aries Spherical represents the pinnacle of road racing helmet technology, according to Contender Bicycles, with Virginia Tech lab tests showing it tops all other bike helmets in safety ratings. The helmet features Giro's proprietary Spherical MIPS system combined with 24 vents and AURA II Reinforcement Arch for optimal breathability and protection. YouTube tester Guy Kesterman praised it as the lightest, fastest, and safest helmet ever made by the brand, weighing just 265 grams for medium size. While it excels in safety and comfort, its compact design may not suit all head shapes, and its premium features come with a higher price tag. This helmet is ideal for serious cyclists seeking maximum protection and performance.

Strengths

— Top safety rating from Virginia Tech labs, outperforming all other bike helmets in every category
— 24 vents with deep internal channeling for superior breathability and cooling
— Spherical MIPS system with Progressive Layering Nanobead EPS foam for enhanced impact protection

Watch-outs

— More compact design may not suit all head shapes or sizes
— Higher price point due to advanced safety and ventilation technologies

$349.95 · Check Price on Amazon Full review →

Ranked #5 in Best Bike Helmets

Trek Starvos WaveCel Cycling Helmet

4.1

The Trek Bontrager Starvos WaveCel Cycling Helmet features WaveCel technology, described as a significant advancement in cycling safety akin to MIPS. Reviewers noted its large, bulky fit and poor ventilation, which caused stuffiness during sweaty conditions. While it's suitable for road and light gravel riding, the design may not appeal to those seeking a sleeker look or better airflow. One reviewer mentioned the helmet's layered construction adds volume, making it less appealing for riders who prioritize comfort and aesthetics. The Starvos is positioned as an entry-level WaveCel helmet from Trek, though it lacks some premium features found in higher-tier models like the Circuit.

Strengths

— Uses WaveCel technology designed to absorb impact during crashes
— Provides a layered internal structure with WaveCel, traditional foam padding, and spacing
— Suitable for road and light off-road/gravel riding

Watch-outs

— Large, bulky fit that may not appeal to fashion-conscious riders
— Poor airflow and ventilation leading to stuffiness during sweaty rides

Buy at trekbikes.com Full review →

How they stack up

Giro Aries Spherical

The Giro Aries Spherical outperforms the Trek Starvos WaveCel helmet in safety ratings and ventilation, with a lighter weight and more advanced Spherical MIPS system. While the Starvos offers impact protection, the Aries Spherical provides superior breathability and a more aerodynamic fit, making it ideal for serious cyclists.

Trek Starvos WaveCel Cycling Helmet

The Trek Starvos WaveCel helmet uses WaveCel technology that's more advanced than the Giro Aries Spherical's traditional foam padding, but the Aries Spherical offers superior ventilation and lighter weight. While the Starvos provides impact protection, its bulky fit and poor airflow make it less appealing compared to the Aries Spherical's sleek design and performance.

Specs side-by-side

Spec	Giro Aries Spherical	Trek Starvos WaveCel Cycling Helmet
Weight	265 grams (medium)	—
Ventilation	24 vents with deep internal channeling	Standard venting
Size	S, M, L	—
Safety Technology	Virginia Tech top safety rating	WaveCel
Construction	In-mold with DryCore sweat management	—
Safety Certification	CE EN 1078	—
Adjustment System	Roc Loc 5+ Air fit system	Large/extra large

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