Electric scooter solid tires are made of hard rubber or polymer, which is often heavy and stiff but highly durable. Some manufacturers refer to solid tires as zero maintenance, as you do not have to maintain the air pressure, but they can get torn, damaged or misshapen. Some solid e-scooter tires have a pocketed structure to provide some cushion. In general, solid tires have poorer ride quality than air-filled tires, as they cannot conform as nicely to the road’s imperfections. The overall pro for solid tires is that riders never have to deal with flat tires. The overall con for solid tires is that they have inferior ride quality.