Traveler Rolling Walker (4900). The NOVA Traveler Rolling Walker is designed for seamless maneuverability in tight or diverse spaces. Wheel Size 9.5″ W x 8″ D x 9.5″ H. 9.5″ W x 8″ D. 26.5″ W x 9.25″ D x (33″ – 37.25″ H).