Originally Posted by spyder3
Like many, i had the forehead issue with the C3 . What solved it for me was to place an S2 liner in the helmet. Problem solved. The new C3 pro also uses the S2 type liner.
Luckily - I don't seem to to have any of these problems. I have 2 helmets as I just bought an XD4. The C3 is very quiet compared to the XD4 - daaah. Obviously, the C3 is better than it comes to wind noise, but what surprised me was how much the C3 shields off the engine noise as well. If the C3pro promise 60% more fresh air - that's a good thing,, as I feel that is a shortcoming of the C3.
I also like the idea of the bigger antennas for the new Intercom system