The rear wheel tires can be inflated with the Joolz hand pump (available separately) or standard bicycle pump. Remove the valve caps first, then inflate the tire (like you would do with a bicycle tire). Note: the maximum pressure of the tire is 1.5 Bar / 28 PSI.
Make sure that all the tires are inflated equally (28 P.S.I – 1.5 Bar). Like tires of a car, the tires should always be at the right pressure to ride comfortably. Right pressure prevent tires to wear and decreases the risk of getting a flat tire