Tires called 16” can be one of several sizes. The most commonly used in the US is the 305 millimeter bead seat diameter. This size tire is used on juvenile, small BMX, folding and recumbent bicycles and some trailers. The 349 millimeter bead seat was used on juvenile, folding and early Moulton bicycles. These bikes came from Germany, Italy and France. If you need help determining which tire you need please see the helpdesk and send us your question.