Kids' bikes with inflatable wheels

 

— wheels are similar to those used in "adult" bicycles: they consist of a rigid rim and a soft rubber tyre, which is filled from the inside with pressurized air. Thanks to this design, both structural strength and softness are ensured, the wheel behaves well on bumps and rough surfaces. Among the shortcomings, sensitivity to punctures and cuts can be noted — tyre depressurization deprives it of all the necessary properties; on the other hand, the probability of such damage is so low that this disadvantage is fully compensated by the merits.