HO RAD 5' DiscHO RAD 5' Disc The RAD disc is built for riders who want to learn tricks, have fun with friends, or simply enjoy a relaxed day on the water. Its compact 5 foot size makes it forgiving for beginners getting up for the first time. The Drop Stitch construction holds pressure up to 20 PSI, delivering the stability and durability you need for consistent performance across different water conditions and riding styles.