BMX/Downhill Helmets - Cyclelink is the ONE STOP ONLINE BIKE SHOP for all your cycling needs. Whether you are a casual, recreational, fitness, sport, extreme, or competitive cyclist Cyclelink can link ... bmxHelmet.com - BMX Helmet Safety, Recomendations and suggestions for ... - Helmet Proper fit. It’s important that a helmet should fit the cyclist properly - according to research most (well over 90%) helmets have been found to be incorrectly fitted.