What Pressures Then?
Weight of Vehicle and Where That Weight is Situated:
Tyre Construction:
Types of Terrain:
Sand
- A starting pressure of 18PSI is in most cases a common theme but one that we don’t use unless the sand is very firm, Instead we recommend for most standard weight 4WD vehicles that 14PSI is a better option with still room for improvement. Our work vehicles operate between 10-14PSI on soft sand and not once in 26 years of training have we lost a tyre off of the rim. Don’t turn like Daniel Ricciardo through the chicanes and neither should you.
Corrugations
- Our work and personal 4WD vehicles operate at 26PSI over corrugations and our reasoning for this is the fifth shock absorber effect this offers to both occupant comfort and avoids overheating of the shock absorbers themselves. We only travel at 80km/h at most on these surfaces and for not extended periods also to prevent overheating of the tyres.
Rocks
- We operate our tyre pressures between 18-22PSI over rocky ground to aid in traction, looking after the terrain and vehicle comfort. We are always mindful of the possibility of rim damage and being lower to the ground actual lack of clearance is something to consider.
Mud
- When we find ourselves dealing with mud our tyre pressures are between 16-20PSI depending on tyre construction/pattern – too low a pressure can see slow leaks arise from mud inside tyre bead and possible sidewall damage from hidden objects.
Gravel Roads
- Similar to corrugations between 26-30PSI depending on the road surface and speed/length of driving time.
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