4x Tyre Inner Tube 3.50-4 Tire inner for Tube 260 x 85 Mobility Scooters Sack | eBay
10 x 3 in. (3.00-4) (260 x 85) Power Wheelchair and Scooter Inner Tube
Amazon.com: AlveyTech 3.00-4 (10"x3" or 260x85) Mobility Tire and Inner Tube Set with Knobby Tread - Fits Pride Chairs, Replacement Wheels & Tires for Scooters, Wheelbarrow, Utility Hand Truck, E-Wheel Chair (1) :
10"x3" (3.00-4, 260x85) Pneumatic Mobility Tire with C248 Powertrax Tread - Monster Scooter Parts