22" x 1 3 8" Solid (Flat Free) Urethane Wheelchair Tube Insert Quantum Q610 Don't buy a whole new Size:13"W x 13"D Don't buy a whole new scooter if all you need is a replacement motor for the Drive Medical Ventura 3 & Ventura 4 scooters 260x85) foam filled tire with the K301 ribbed tread pattern that fits many mobility scooters and power chairs Solid 22"x1 3 8" urethane wheelchair urethane inner tube can be used as a replacement for any 22"x1 3 8" standard pneumatic (air filled) inner tube This means mounting inserts require a little bit more effort and patience than mounting traditional pneumatic tubes and tires but the results are usually worth the accomplishment