Bicycling magazine had an excellent article that delved into this: http://www.bicycling.com/sites/default/files/uploads/BI-June-13-Helmet.pdf http://www.bicycl

Bicycling magazine had an excellent article that delved into this: http://www.bicycling.com/sites/default/files/uploads/BI-June-13-Helmet.pdf http://www.bicycling.com/sites/default/files/uploads/BI-June... Their assertion was that this boiled down to: do you want open head trauma or closed head trauma? I'm not so sure that it's quite that simplistic, but seeing the data on how the helmet industry is needlessly hamstrung by outdated standards from 30 year old standards bodies is pretty startling and depressing. This alone should make you reconsider your notions of how safe your helmet really makes you. (Of course, I still wear mine.)