The life maxx lmx83 crosmaxx fractional plates are great rubber weight plates that should ideally be used with a bar that has a diameter of 50mm these plates are made completely of really high quality rubber so you know you re getting top value for the money you have sent when you purchase these plates being made entirely of rubber also means that if the bar is dropped with them on they make less noise than your average weight plate key features of the life maxx lmx83 crosmaxx fractional plat