<https://www.nonstoparticle.com/different-classes-of-tyres-and-routine-maintenance-procedures/>
<http://schema.org/description>
"All tyres generally lose about 1 to 4 PSI of air every month that needs to be refilled to maintain the on-road performance and safety."
<https://www.nonstoparticle.com/different-classes-of-tyres-and-routine-maintenance-procedures/>