agree with some caveats. helmets are a must when cycling on roads. but parks are a bit different. also, i remember a study that said drivers are more cautious w

agree with some caveats. helmets are a must when cycling on roads. but parks are a bit different. also, i remember a study that said drivers are more cautious when they see a cyclist without a helmet. not sure how relevant the study was, but as a driver i can confirm this. all this being said, summer time + helmet = lots of sweat.