Roscoe Knee Scooter Black, 4 ft. 11" to 6 ft. 6" Accomodates, 350 lb Weight Capacity For patients who are unable to put weight on their foot or ankle the Roscoe Knee Scooter offers a convenient and contemporary solution to traditional crutches. 8-inch rubber wheels with sealed bearings. Adjustable hand brake. Padded knee platform with easy-adjustment mechanism. Padded handlebar grips.