60" deck diameter, 30" front riser height Quick and agile like its younger brother, yet roomy enough for two. Experience a thrilling ride kneeling or standing! With a name like this, you know this is no wimpy little tube. In fact, this Big Momma of a tube is a 68" monster that will easily hold up to four adults and still deliver a thrill of a ride. Constructed of heavy-duty nylon, it comes equipped with eight contour-molded PVC handles so everyone has a place to grab when things get wet and wild.