Giro Aries Spherical Mips Helmet: 24 Wind Tunnel Vents, Roc Loc 5+ Air Fit (£300)
The Giro Aries Spherical Mips is a road helmet that Giro says is lighter and sleeker than its earlier models, built around Spherical Technology. We have not tested it. This page collects what Tredz lists and the current price.
Available now: Giro Aries Spherical Mips Road Cycling Helmet — £199.99 at Tredz, correct at time of writing, 25 October 2026.
What the retailer lists
- Protection: Spherical Technology, a ball-and-socket design powered by Mips, with dual-density Nanobead EPS foam.
- Rating: Giro says Virginia Tech gave Giro Spherical helmets its top 5-star rating.
- Airflow: 24 Wind Tunnel vents with an Aura II reinforcing arch and internal channels.
- Fit: the Roc Loc 5+ Air fit system, with a DryCore brow pad to move sweat away from the eyes.
- Weight: Tredz’s listed figure for size medium looks like a typo, so check Giro’s own page for the weight.
Where it fits for triathletes
The points below are our reading of the listed features, not test results.
- Hot, hard rides. The vent count and internal channels target airflow on climbs and in summer racing. We have not tested it.
- Draft-legal racing. It is a ventilated road helmet, not a time trial lid.
Where to buy
Tredz lists the Giro Aries Spherical Mips Road Cycling Helmet at £299.99 at time of writing, and the link below goes to the same product page.
Related guides
See also our best cycling helmets for triathlon training, the Giro Syntax Mips review and the aero helmet guide.
This article contains affiliate links. If you purchase through these links, we may earn a small commission at no extra cost to you. This helps support The Triathlete.
