Ultimate Overland Tyre Pressure Calculator for 4WD & Utes

Ultimate Overland Tyre Pressure Calculator

Dial in safe, trail-tested pressures by vehicle, load, terrain, speed, tyre size and hardware. Export a printable card and save your setup.

PSI to kPaTyre size parserTowing & speed awareBeadlock logicAxle weightsPresets
Overlander airing up tyres

Why tyre pressure matters off-road

Tyre pressure is your #1 traction tool. Aired-down tyres lengthen your contact patch, improve grip, protect the vehicle and smooth out corrugations. But pressures depend on a dozen factors: vehicle class, axle weight, loadout, towing, terrain, speed, tyre construction, rim hardware and temperature. This calculator blends those inputs into a sensible starting point — then lets you save a setup and export a pocket-card for quick trail reference. Learn more at Overland Gear Guide.

Overland Tyre Pressure Calculator

Add your setup, terrain and extras — get front/rear recommendations in PSI or kPa.

Vehicle

Cold inflation reference ~20 °C. Rule of thumb ~1 PSI per 10 °C.

Tyres & Rims

We’ll parse diameter & map a size band. You can still set a band manually below.
Enter either PSI or kPa — we’ll auto-sync.
Higher load index → slightly firmer minimums at speed.
We’ll bias minimum safe PSI by load rating and speed band.

Terrain

Actions

“Save Setup” uses your browser’s storage on this device.
Front: — PSI
Rear: — PSI
Guide only. Cross-check your door placard & tyre specs. Re-inflate for highway speeds after soft surfaces. Reduce speed when aired down.

How to use this calculator

  1. Select your vehicle type and typical load.
  2. Add towing, speed band and local temperature.
  3. Enter tyre size (e.g., 285/70R17) or flotation (33×12.5R15).
  4. Tick hardware (LT tyres, beadlocks, bull bar, canopy, RTT, drawers).
  5. Choose terrain or tap a preset (Sand, Rocks, Reinflate).
  6. Optionally enter axle weights and door-placard pressures.
  7. Hit Calculate, then export a printable card.

Trail safety tips

  • Drive slower when aired down to manage heat and sidewall flex.
  • Avoid sharp steering inputs on very low pressures without beadlocks.
  • Re-inflate to road pressures before long sealed/high-speed sections.
  • Use a quality gauge & inflator; check pressures cold when possible.

Overland tyre pressure FAQs

How low can I go without beadlocks?

As a rule of thumb, keep off-road minimums around 16–18 PSI for LT tyres without beadlocks; slower speeds allow lower than highway, but avoid aggressive manoeuvres.

Do bigger tyres always mean lower pressure?

Larger diameter tyres can support the same load at a slightly lower pressure, but speed, construction, load and terrain still dominate the final number.

Does temperature change my pressures?

Yes — roughly ~1 PSI per 10 °C vs a 20 °C reference. The tool nudges recommendations accordingly.

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