#1. Giro Aries Spherical Bike Helmet

Our Score 8.9 / 10 Score details
Specifications
| Brand | Giro |
|---|---|
| Impact Protection System | MIPS |
| Construction | In-Mold |
| Fit System | Roc Loc 5+ Air |
| Size | M |
| Vents | 24 vents |
| Weight | 0.6 oz |
Pros
- Advanced rotation protection
- Secure with smooth tuning
- High-vent design
Cons
- No recognized certification
- Heavy helmet
The Giro Aries Spherical is a standout pick for anyone shopping specifically in the MIPS bike helmet lane. It pairs MIPS rotational protection with a spherical-inspired shape meant to manage crash forces across more impact directions. The result is a helmet that feels built for real-world riding angles, not just straight-line hits. The Roc Loc 5+ Air fit system also makes it easy to dial in tight, even contact, so the MIPS layer has a better chance of doing its job when you need it.
The main trade-off is weight. At about 0.6 oz, it is on the heavier side compared with many road-focused MIPS models. That can matter on long climbs or for riders who notice every gram. If you want strong rotational protection and stable fit over all-day comfort, this is a solid choice. If you are sensitive to weight or prefer very light helmets, look closely at alternatives before you commit.
