Originally Posted by
mpath
No doubt lighter is better, in the famous words of Colin Chapman, "To increase speed, add lightness." But I've done century rides with my Ionos and the benefits of a lighter helmet is marginal, academic, or moot, to me. Unless you are a racer.
As I have mentioned, I have both an Ionos and Prolight so am not defending my choice of having bought one or the other. In my case I was referring to comfort, especially on longer rides, not a speed benefit. 1/4 lb on the bike will have no effect on comfort, but on the top of your head, it can.
Colin Chapman, btw, is/was one of my heroes.