Bell Custom 500 Carbon HelmetBell Custom 500 Carbon Helmet The Custom 500 Carbon is the epitome of classic Bell protection, with genuine stitched leather interior thats wrapped in a carbon composite shell. The ultimate in a high end 3 4 helmet from the brand that started it all. Core Since 54 The Custom 500 is the epitome of a classic 3 4 helmet. With 5 shell sizes the Custom 500 is sure to give the rider a personalized fit regardless of where you are on the size chart. The