Motivo designed and engineered the Tour upright walker and reinvented the way stand behind walkers can be used. Their design brings you in closer to the axis giving the user a more upright walking position and also a much tighter turning radius. PopFoam helped validate the wheel/tire design along with the pivoting fork, tool up for foam/plastics and is now in production for the wheel/tire assemblies. Check out their product at: www.motivolife.com