If aero road helmets were solely about going fast, we’d see a lot more people in full-blown TT lids. As it turns out, it’s still critically important that these helmets provide sufficient airflow to keep our heads reasonably cool.
We subjectively scored each of the helmets on their ability to move air across our heads while traveling at both ‘cruising speed’ – roughly 18-25mph – and during much faster mountain descents, all around mid-day in hot Colorado sunshine. Most of the helmets fared reasonably well, and some were downright surprising in how much air you could feel rushing across your scalp. Others, though – not so much.