I'm thinking about using my skateboard helmet for general purpose bike riding (everything except training/racing). The helmet I have is protec ace, which claims to be CPSC certified for biking and skateboarding. Is anyone familiar with the safety standards of helmets, and what the certifications actually mean? I know there are skateboard helmets out there that look cool, but don't actually protect you. I want to make sure I have something that's actually been tested to save lives.