You have questions, we have answers:

How do I know which type of compressor I need?


Will I only be using the compressor for the car or also for bikes, toys, balls etc.?

(Consider the number of adapters and the strength of the unit which you need.)

Will it always be kept in my car or will I also use it at home?

(Consider buying a compressor with a specific option for both an AC and a DC connection.)

Are these features important to me: Automatic shut-off, emergency LED light and a digital display?

(Choose the digital compressor.)

Do I find an analog display easier to read, and I need more PSI?

(Choose the analog compressor.)

Is the air flow rate important to me?

(Consider: The digital compressor gives 30 liters per minute. The analog compressor  gives 20 liters per minute when connected to a home wall socket, and 18 liters per minute when connected to your car.)

Is the weight of the compressor important to me?

(The digital compressor is 5lbs and the analog compressor  is 3.3lbs.)

Is measure accuracy important to me?

(Digital compressor : +- 1PSI. Analog compressor : +- 3PSI)

How do I know to which PSI I should fill my tires?

The PSI is usually printed on a sticker that is located on the top of the door frame on the driver’s side of the car. This is the recommendation of the car manufacturer. On some vehicles, the sticker is found on the trunk door or on the fuel door. If your vehicle lacks this information the correct tire pressure should be found in your car’s user manual.

Most cars will recommend between 32 and 35 PSI.

Warning! Do not pay attention to the PSI displayed on the tire walls which sometimes display the maximum tire pressure and not the pressure recommended for your vehicle. Too much pressure can ruin the tire.

How often do I need to fill and check my tire pressure?

You need to inflate your tires once a month because they lose 1 PSI each month. You should also check if there is a puncture that has caused a loss of air.

Also, when the air temperature changes 10 degrees Fahrenheit, tire pressure will change about 1 PSI so it is worthwhile to replenish your tires’ pressure. (A rise in temperature raises the PSI and a drop in temperature lowers PSI.)

Remember: When your wheels are inflated to their recommended pressure you will benefit from their optimal lifespan and performance.

When is the recommended time to fill the tires?

Tire manufacturers suggest checking tires when they are cool since that way the reading will be more accurate. Outside temperature can cause tire pressure to change up to 1 PSI for each 10 degrees. Higher temperature means higher PSI readings, so the most appropriate time for filling tires is the morning when the temperature is lower. Also, in the morning the tires are cooler if the car has been idle for three or more hours. Using the air compressor at the gas station means that your tires are likely to be “warmer”.

When you have a quality air compressor from the Prow Company you can fill your tires straight away in the morning after your car has been parked overnight, and benefit from maximum PSI accuracy with your tires filled to their recommended PSI so you can benefit from their optimal lifespan and performance

Sometimes my tire pressure increases by itself when I go for a long drive, so my question is, do I need to fill less PSI than what the car manufacturer writes?

All tires warm up whilst driving raising the air pressure. You should inflate to the PSI recommended by the manufacturer in the morning when your car has been parked for 3 or more hours. Then, if the tires warm up and the pressure rises you need not worry since the tires are designed having taken into consideration these properties.

Only when the air temperature changes by 10 degrees Fahrenheit does the inflation pressure of your tire also change about 1 PSI and then, it is worthwhile to replenish your tires’ pressure.  (A rise in temperature raises the PSI and a drop in temperature lowers PSI.)

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