I ride in the tropics, just a baseball cap to keep the sun off my bonce.
When the sun is hiding, I go bare-headed, and can feel the difference immediately. My blood doesn't heat up so much and my times get better.
Wearing a baseball cap slows me down, so I'm sure a plastic dome, or polystyrene basket would also slow me down.
My training ride is a quiet mountain with the same profile as Alpe d'Huez.
Traffic is not a danger.
When the sun is hiding, I go bare-headed, and can feel the difference immediately. My blood doesn't heat up so much and my times get better.
Wearing a baseball cap slows me down, so I'm sure a plastic dome, or polystyrene basket would also slow me down.
My training ride is a quiet mountain with the same profile as Alpe d'Huez.
Traffic is not a danger.