Automatic Tire Inflation for Tractors & Trailers
More than 100 billion industry-proven miles
Save $2400 per Tractor Trailer Annually with Halo Automatic Tire Inflation
Extend Tire Life | Improve Fuel Economy | Maximize Uptime
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Check out our frequently asked questions for more detailed information on our tire management solutions.

The cold inflation pressure is the tire pressure when the air in the tire is “cold,” roughly the same temperature as the air outside of the tire.

Examples of things that will affect the CIP are direct sunshine on the tire and tire heating due to driving. To get an accurate measurement of CIP the tire must be resting and not exposed to direct sunlight for at least 3 hours.
Typically tire pressure varies 2-3 psi/10 deg F. The change in pressure is because air expands when it’s warmed and contracts when it’s cooled.
The Halo is a self-contained pump that generates pressure when rotated. It has a pendulum-like mass, similar to a self-winding watch, that hangs while the pump is rotating with the wheel. The relative rotational motion is used to create a pumping action.
The Halo will pump air at all speeds. If the wheel is rolling the pump is capable of generating pressure.
Yes! Actually tire pressure is easier to measure with the Halo installed because it allows tires to be measured right at the hub through schrader valves on the Halo.
The Halo device will only add air until the target air pressure is achieved in the tire(s). If the target pressure is 100 psi, the pump will turn itself off when the tire pressure exceeds 100 psi.
A key design feature of the Halo is a smart regulator that ensures it will only pump air when the tire pressure is below the target pressure setting. So if the target pressure is 100 psi and the tire’s cold inflation pressure is 97 psi, the Halo will add air until the pressure is 100 psi and then the regulator will turn the pump off.
The Halo has been tested in a variety of climates, from winters in Canada to summers in Florida and everything in between. It has been designed to function in temperatures ranging from -40F to 257F (-40C to 125C).
Halo and Halo Connect are currently available on our e-shop.

The Halo mounts directly to the axle cap or hub cap using a bracket similar to that of a hubodometer.

An experienced tech, someone who has installed 1 or 2 Halos, can outfit an entire tractor or trailer in 20-30 minutes.

Halo is compatible with the majority of class 7 & 8 tractors and trailers, box trucks, buses, and refuse vehicles.

The Halo will be compatible with the majority of class 7 & 8 tractors and trailer wheels, hubs and tires. The Halo device currently is NOT recommended for use on wheels with convex shape (e.g. the steer positions of Class 7 & 8 tractors/buses). The convex shape of the Steer tire wheel end makes the Halo device more difficult to safely mount via a bracket system. We are exploring options for this wheel position and should have a solution in the future.

The Halo will operate effectively for 500,000 miles or 10 years, depending on the vehicle’s annual mileage, under normal operating conditions.

The Halo weighs approximately 5 lbs. and will not cause wheel imbalance issues because it is mounted near the center of the wheel end (like a Hubodometer). In our real-world testing with numerous fleets spanning more than two years and driving over eight million miles, there has not been any incident where the Halo device caused noticeable wheel balance issues of any kind.

The hoses and connectors are similar to those used in central tire inflation systems. They are road tested and proven to be reliable and robust for this type of application.

The standard warranty period is 36 months.

Ask your Aperia Sales representative for further information. Extended warranty plans can be quoted for large purchases.

You need one Halo per wheel end. We set Halos in truck kits.  The single axle kit is ($770) for 2 Halos. The tandem axle kit is ($1,540) for 4 Halos.

The Halo Connect is a one time purchase of $850 for your hardware. The monthly connectivity fee is $10 a month.

We set PSI for you before shipping out your Halo. We then seal the Halo for life. This way no salt, dust, mud can get inside. Therefore the set point cannot be altered once set.