Lúntāi yālì de dānwèi shì bàng měi píngfāng yīngcùn.
Tire pressure is measured in pounds per square inch (psi).
Tips
usage
Construction is fully systematic: 平方 ('squared') + 英寸 ('inch'). The same template gives 平方英尺 (square foot), 平方英里 (square mile), 平方厘米 (square centimeter). The 英 in 英寸 marks it as the British/imperial unit, distinct from 市寸 (Chinese inch).