Originally Posted by
GAtkins
If you use any kind of cap or visor under your helmet larger may be the way to go.
Glenn
There is a visor option for the Lumos (for a few extra $$$). I might look at it some, but for most of my helmets I've been removing the visors because in road riding position, the visors obscure the upper view.
I don't think I've ever worn a cycling cap.
I have used a knit cap off and on in the past, but for most of my riding it hasn't been necessary. I don't think I'd really need it until at least 25° or so.
I have, however, worn a sweat band at times. Not real thick, but as calculated above, it really wouldn't take much to affect the fit.
Anyway, as mentioned, I've been leaning towards the larger helmet. Unfortunately it is something that I can't just try.