Giro
Giro Aries Spherical
$349.95
Best Bike Helmets · head-to-head
Giro Aries Spherical vs Trek Velocis MIPS
A sourced, side-by-side comparison. Trek Velocis MIPS is cheaper at $329.99. Every spec and price links to its source.
Trek
Trek Velocis MIPS
$329.99Cheaper
Which is better: the Giro Aries Spherical or Trek Velocis MIPS?
On the specs we track, they're closely matched. The Trek Velocis MIPS is the cheaper at $329.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Giro Aries Spherical | Trek Velocis MIPS |
|---|---|---|
| US price | $349.95 | $329.99 |
| Brand | Giro | Trek |
| Released | — | — |
| Weight grams | 270 | 260 |
| Rotational protection | MIPS Spherical | MIPS Air |
| Shell construction | in-mold | — |
| Vent count | 24 | — |
| Intended use | road | road |
| Size range (cm) | 51-63 | 51-63 |
| Certification | EN 1078 | CPSC |
| Visor included | No | — |
| Integrated light | No | — |
| Reflective detailing | Yes | — |
Sources — Giro Aries Spherical: giro.com (verified 2026-07-13). Trek Velocis MIPS: trekbikes.com (verified 2026-07-13).
What's the difference between the Giro Aries Spherical and Trek Velocis MIPS?
Where the two actually differ on the specs we track (3 of 10). Matching specs are omitted.
- Weight grams: Giro Aries Spherical 270 vs Trek Velocis MIPS 260
- Rotational protection: Giro Aries Spherical MIPS Spherical vs Trek Velocis MIPS MIPS Air
- Certification: Giro Aries Spherical EN 1078 vs Trek Velocis MIPS CPSC