Note: Ordinary tires (outer tires equipped with inner tubes are ordinary tires) Original ordinary tires can not be directly replaced with vacuum tires. For details, please consult the vehicle sales agency Vacuum tire (vacuum tire without inner tube) Vacuum tire plus matching type inner tube can be used as ordinary tire Model: pneumatic tire Unit for sale: inner tube + outer tube (one set) Specification: 12 1/2 * 2 1/4 (57-203) / 12 1/2 * 2 1/4 (62-203) Level: 4 floors Maximum load: 120kg Maximum air pressure: 250 Size: Reference picture Applicable types: battery car / electric wheelchair / scooter, etc. Please see pictures to confirm size and compatibility before order. If you have any problem,please feel free to contact us.