Two technicians are discussing a tire with the size designation of P345/25ZR20 100Y. Technician A says that this tire has a load rating of over 1700 lbs. and a speed rating of at least 186 mph. Technician B says that the tire has a speed rating of up to 300 kph, and will fit a 20-inch rim. Who is correct?

Question

Quizplus · Accepted Answer

The tire size designation indicates a load index of 100, which corresponds to a load rating of 1764 lbs. The speed rating 'Y' indicates a maximum speed of 186 mph or 300 kph. The '20' in the size indicates it fits a 20-inch rim.

Two Technicians Are Discussing a Tire with the Size Designation