This calculator is designed to provide you with suggested minimum and maximum tyre pressures along with minimum and maximum tow ball weights according to the weights declared on the trailers compliance plate.

To use this calculator, you only need the TARE and GTM values from the trailers compliance plate, along with the trailers tyre load specifications (see below)

We recommend using this calculator as a guide until you can complete a proper weighing of your vehicle and trailer. Once actual weights are known, you can use our Complete Towing Calculator to generate a complete towing report.

Identify and record the load ratings from the tyre sidewalls of your trailer (see photo below)

Notes on tyre load ratings; not all tyres are the same, the load rating on your trailer tyres may be quite different to your tow vehicle. Use the load rating for SINGLE (see photo above for clarification). The DUAL rating is for axles with dual tyres on each end of the axle (ie. 4 tyres on one axle) and our calculators are not designed for that configuration.

That’s it, now simply enter your records into the calculator to see minimum and maximum tyre pressures calculated specifically for your trailer and tyre combination. If you would like a report including ball weights (TBM), simply enter your Name and Email then click the “Email Full Report” button to receive the report via email.

Feel free to leave comments or questions below.