I guess it's a moot point for me anymore, but I see all that metal around a cager to absorb the bumps and only air around me while on my bike and I simply can't think in terms of putting myself into that degree of exposure. I guess it's what you get used to but I really prefer measuring my clearance in terms of feet instead of inches between me on a bike and some unknown honyock or another in their steel cage. With my luck I would probably forcibly meet one of those door openers.

Lou