In defense of my lbs: he's a shop mechanic and not the owner. He was telling me what the manufacturers state. As far as commuting bumps: I take a train and the helmet takes its fair share of light bumps. I think nashbar is monitoring this post as I got an email from them today, stating they have a great helmet sale w/ free shipping. They even have have the XL sized one on sale for the pumpkin heads of the group Sorry couldn't resist. Charlie