Originally Posted by JamesWilson2
I want to say that the Zamps have a similar fit to a Sparco, Bieffe (the old ones), and HJC....tighter in the cheeks and not as "round" on the crown of the head like the old Bells. Medium should be fine for you IMO.
From my understanding, Zamp imports the Bell helmets from Europe and they are sold here with a B2Z logo on them. So, they are basically Bells. I am a big HJC fan since I've owned a couple of their motorcycle helmets. I have an AR-10 auto helmet, but that SI-12 in flat black is pretty sweet if you have the cash.
Lots of good info here... http://www.racinghelmetguide.com/