tires

I feel many people will still use regular tires which need air unless tires which don't need air are more affordable to buy, help save more gas, and are a lot more durable.

Most car tires quality are probably good enough for driving at 50 KM/h(30 MPH) on a smooth city road, and lasting for a few years or many miles/Kilameters of use. But, there are cheaply made tires which are not good for driving on, and can be unsafe on faster highways where the rubber and other...