Giro

Giro Aries Spherical

Name: Giro Aries Spherical
Brand: Giro

Top Pick

Top pick and upgrade: dual-density EPS, a moving Spherical shell and AURA II reinforcement underpin a Virginia Tech five-star result with an 8.40 STAR value.

$263 typical

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EDITION 01RESEARCHED 2026-10-244 SOURCESREFRESH DUE 2027-04

SUBSTANCE SCORES

substance9.3/ 10

design8.8/ 10

value9.1/ 10

WHY THE PRICE IS JUSTIFIED

The premium is supported by a distinct ball-and-socket Spherical construction, dual-density Nanobead EPS, AURA II reinforcement, extensive ventilation and an adjustable Roc Loc 5+ Air system. Independent Virginia Tech testing reported five stars and a STAR value of 8.40. Comfort benefits from deep channels and DryCore, but the helmet is not especially light and the front shell can require deliberate off-centre pressure when adjusting it.

MATERIALS

Liner43% EPS

Dual-density EPS is intended to manage impacts across different speeds.

Shell30% polycarbonate

In-mold polycarbonate supports the liner and contributes to structural coverage.

Reinforcement3% fiberglass

AURA II reinforcement supports shell integrity around large vents.

Retention and paddingNylon, polyester, POM, PU and silicone components

These materials are used across the adjustment, comfort and sweat-management systems.

CRITERIA

9/10

Build Quality

Polycarbonate in-mold construction, AURA II reinforcement and full lower hardbody coverage support a durable, carefully engineered build.

9/10

Performance

Virginia Tech reported five stars and STAR value 8.40; dual-shell Spherical design, dual-density EPS and ventilation support protection and cooling.

8/10

Value

High price is partly explained by independently measured protection and unusual construction, but comparable helmets can cost less.

IDEAL FOR

·Road, gravel and endurance riders prioritizing protection and cooling
·Buyers seeking premium fit adjustment and dual-shell energy management
·Riders comfortable paying for measured safety performance and refined ergonomics

NOT FOR

·Strict weight-minimizers
·Buyers seeking the lowest-cost certified helmet
·Anyone whose head shape does not suit Giro's fit

DESIGN & ERGONOMICS

Slim road-helmet silhouette, 24 listed vents and deep internal channels emphasize cooling. Roc Loc 5+ Air offers one-handed tension and tilt adjustment, while DryCore and Ionic+ padding address sweat and odour. The Spherical outer section may need an off-centre push to move the whole helmet.

LONGEVITY

Giro states that full lower hardbody coverage improves durability and lists a minimum two-year EU legal guarantee. Long-term failure data and expected lifespan were not established. Cyclingnews reported an older front sweat-pad tab issue on a prior design; no equivalent long-term failure evidence was located for this model.