Off-road tyre pressures: the complete guide
Sand, gravel, mud and rocky terrain pressures, plus how to air down, reinflate, and avoid the most common beginner mistakes.
Lowering your tyre pressure is the single most effective adjustment you can make off-road. It improves traction, smooths the ride, reduces the chance of getting stuck, and is free. Yet most beginners either don''t do it or don''t lower pressures enough. This guide covers when to air down, how much, how to do it properly, and the lessons we''ve learned from doing it wrong on Australian beaches and gravel tracks. "If your tyres still look round when you''re aired down, you haven''t aired down enough." Why tyre pressure matters so much Tyre pressure changes the shape and size of the contact patch — the area of rubber actually touching the ground. Higher pressure: small contact patch, less grip, harsher ride, more digging on soft surfaces. Lower pressure: large contact patch, more grip, smoother ride, the tyre flexes over obstacles instead of fighting them. Airing down lets the tyre conform to the terrain instead of bouncing across it. On sand, that''s the difference between floating and sinking. Quick pressure guide Use this as a starting point. Adjust based on your vehicle weight, tyre type and conditions on the day. Highway: 32–36 PSI Gravel roads: 28–32 PSI Sand (general beach): 18–22 PSI Soft, dry sand: 14–18 PSI Mud: 20–25 PSI Rocky terrain: 22–28 PSI Recovery only, short distance: 12–14 PSI There''s no single "perfect" PSI. The goal is to match pressure to conditions and reassess as those conditions change. Why beginners don''t air down enough The most common mistake we see isn''t skipping airing down — it''s being too cautious about it. "I don''t want to roll a tyre off the bead" — at sensible pressures (16+ PSI) and sensible speeds, this is rare. "I don''t want to damage my rims" — modern alloys are tougher than people think. "I''ll just try it at 25 PSI first" — by the time you''re bogged, you''re lower than you would have been if you''d started right. The lesson: commit. Air down properly the first time. When to air down Timing matters as much as the number itself. Air down before entering sand, mud or rough tracks. Don''t wait until you''re struggling. By then it''s a recovery situation. Reassess as conditions change — afternoon sand is softer than morning sand. If you''re bogging, drop another 4–6 PSI. A small adjustment early prevents a big problem later. How to air down properly Keep it simple, consistent…