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How to Put Air in Dually Tires: A Step-by-Step Guide

Maintaining proper air pressure in your dually tires is crucial for optimal performance, safety, and longevity. In this step-by-step guide, we will walk you through the process of putting air in your dually tires, ensuring they are properly inflated for a smooth and safe ride.

Dually tires, also known as dual rear wheels, are commonly found on trucks and other heavy-duty vehicles. They consist of two tires mounted on the rear axle, providing increased stability and load-carrying capacity. Properly inflated dually tires improve handling and enhance fuel efficiency and tire lifespan.

Understanding Dually Tires

Dually tires have an inner and outer tire on each side of the axle, with a small gap between them. This design distributes the load more evenly and enhances the vehicle’s stability, especially when carrying heavy loads or towing. However, it also means that you must pay attention to both tires when checking and adjusting the air pressure.

Tools Required to Put Air in Dually Tires

Before you start, gather the following tools:

  1. Tire pressure gauge: Choose a reliable gauge that provides accurate readings.
  2. Air compressor: If you don’t have one, you can find them at most gas stations or automotive supply stores.
  3. Valve stem caps: These caps protect the valve stems from dirt and debris.

How to Air up Dually Tires?

Maintaining the correct air pressure in your dually tires is essential for several reasons. Adequate air pressure ensures even weight distribution, enhances traction, improves braking performance, and reduces the risk of tire failure, such as blowouts or tread separation. It also helps optimize fuel efficiency and extends the life of the tires.

Step 1: Park in a Safe Location

Find a safe and level area to park your vehicle. Engage the parking brake and turn off the engine.

Step 2: Locate the Valve Stems

Identify the valve stems on each dually tire. Valve stems are small rubber extensions that protrude from the wheel. They allow you to inflate or deflate the tire.

Step 3: Remove Valve Stem Caps

Remove the valve stem caps by twisting them counterclockwise. Place them in a safe location to prevent loss.

Step 4: Check the Current Air Pressure

Use the tire pressure gauge to check the current air pressure in each tire. Insert the gauge into the valve stem and press firmly to create an airtight seal. The gauge will provide a reading of the tire’s air pressure.

Step 5: Inflate the Tires

Connect the air compressor hose to the valve stem. Ensure a secure connection, so there are no air leaks. Start the air compressor and allow it to build pressure.

Step 6: Use an Air Pressure Gauge

While inflating the tires, periodically check the air pressure with the gauge. Inflate the tires gradually, using short bursts of air to avoid overinflation. Refer to the manufacturer’s guidelines or the vehicle’s manual for the recommended air pressure.

Step 7: Recheck the Air Pressure

Once you have reached the desired air pressure, remove the air compressor hose from the valve stem. Use the tire pressure gauge again to verify the air pressure. Adjust if necessary.

Step 8: Reinstall Valve Stem Caps

Securely screw the valve stem caps back onto each valve stem. This protects the valve stems from dirt, moisture, and debris.

Step 9: Repeat for Other Tires

Repeat steps 4 to 8 for the remaining dually tires, ensuring all of them have the recommended air pressure.

Step 10: Verify All Tires’ Air Pressure

Double-check the air pressure in all tires using the tire pressure gauge. Ensure they match the manufacturer’s recommendations or the vehicle’s manual.


Maintaining the proper air pressure in your dually tires is crucial for safe and efficient driving. By following this step-by-step guide, you can easily put air in your dually tires and ensure they are inflated to the correct pressure. Remember to check your tire pressure regularly to maintain optimal performance and safety.

FAQs about Dually Tires

Can I use a regular air compressor to inflate dually tires?

Yes, a regular air compressor can be used to inflate dually tires. Just make sure it is capable of delivering the required air pressure.

What is the recommended air pressure for dually tires?

The recommended air pressure for dually tires can vary depending on the vehicle and tire specifications. Refer to the manufacturer’s guidelines or the vehicle’s manual for the correct air pressure.

How often should I check and adjust the air pressure in my dually tires?

It is recommended to check your tire pressure at least once a month and before long trips. Adjust the air pressure as needed to maintain the recommended levels.

Are there any special considerations when inflating rear dually tires?

When inflating rear dually tires, it is important to pay attention to both the inner and outer tires. Ensure they have equal air pressure to maintain proper balance and weight distribution.

Can I drive with low tire pressure in my dually tires?

Driving with low tire pressure is not recommended. It can negatively affect the vehicle’s handling, fuel efficiency, and tire lifespan. Always maintain the recommended air pressure for optimal performance.