62mm/98A Single-Con Yellow Jackets. The wheels measure 62mm x 38mm, with a 26mm contact patch.The Rainskates Yellow/98a Urethane formula is well know for the special combination of SPEED & GRIP, and is the "go to" wheel for most people These S/C versions feature a rounded outer lip, and an inner conical bevel, for smoother transition on, and off the coping.