How we tested

For the test here, we’ve picked nine of the best aero road helmets currently available and put them through their paces on the roads to assess ventilation, comfort and usability features such as the ratchet, buckle and straps. Safety features were examined (all the helmets here come with EN1078 safety certificates and some have the Virgina Tech ratings-leading MIPS) before the most noteworthy six were taken to Evesham’s stellar Boardman Performance Centre for wind-tunnel testing at a variety of yaw angles, tri-bar positions and speeds.