Originally Posted by
Retro Grouch
That would be my bet too, but I keep hearing anecdotal stories to the contrary. Sometimes 1 measurement is worth 1,000 guesses.
I'd be interested in seeing measurements concerning the cooling affect of shade and airflow through the helmet vs. a bare head too.
Maybe someone could do some comprehensive tests with a sensor and a meter on the handlebars. Might be the next thing to come out on the market for cycloputers.