Joined: Dec 2004
Posts: 12,537
Likes: 791
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed
I think airflow matters more than helmet color. Two inches of styrofoam pretty much blocks any solar gain. Or is the helmet white to match an upcoming bike?