Initially designed for the European market's UCI races, these are also a requirement for USABMX Nationals. The Box Two Side Number Plates are shaped from embossed foam and feature full-color printed graphics. They comply with UCI regulations and fit all bicycle frames. Hook-and-loop straps combined with a piece of adhesive-backed hook-and-loop tape hold the plates firmly in place. They have a black with a white background (colored backgrounds are available separately).