Wind tunnel tested: Which aero road bike helmets are the fastest?

When buying a road bike helmet, your primary motivation most likely relates to safety. In the event of a crash, the added protection offered by a certified helmet can be the difference between walking away with little more than your ego bruised and, well, not walking away at all. 

But there isn’t a simple answer to whether one helmet is safer than the next. There are a select few third parties that perform independent tests, but at an industry level all we know is that they’ve met the relevant local authority’s minimum standard, which, brands tell us, is a low bar.