Bell Hub Bicycle Helmet. The Bell Hub Bicycle Helmet has similar features to Bell's high end performance helmets, but re imagined for the streets with the bike commuter in mind. Overbrow Ventilation helps get you to work with less sweat while the Twin Axis Gear TAG Fit System is simple, secure, and plays nice with eyewear. Other smart touches include Cool Mesh padding, an integrated clip on light mount, reflective trim and a soft brim visor. Furthermore, the Hub is equipped with the ICEdot emergency notification service that syncs your secure online profile with a Bicycle Helmet sticker containing a unique code.