For tire maintenance, which marking indicates the proper inflation pressure?

The proper inflation pressure for a vehicle's tires is commonly indicated on the vehicle’s door jamb or the sidewall of the tire itself. This marking is crucial because it provides specific information tailored to that vehicle, depending on its model and load capacity. On the door jamb, there is typically a sticker or plate that details the recommended tire pressures for the front and rear tires, often under various load conditions.

This information is vital for maintaining safety and optimal tire performance, ensuring that the tires are inflated to the recommended levels for safe driving and better fuel efficiency. The sidewall of the tire also contains important information, including the maximum pressure the tire can handle, but the actual recommended pressure for that specific vehicle can usually be found on the door jamb.

While the owner's manual contains useful information, it is less practical for daily reference during tire checks since the door jamb provides immediate access whenever the vehicle is in use.