So is over-inflation.
Always inflate to the correct pressure as per the placard.
If you are driving in unusual conditions,
My little Jimny weighs bugger-all but needs Light Truck tyres.
On-road pressure is a very light 26 PSI.
If I am driving through Sand, Mud or Snow I will deflate to an appropriate pressure and drive slowly.
If I am driving over rocky terrain, I will also deflate to an appropriate pressure for better adhesion.
As soon as I hit the Tarmac again, I will reinflate back to 26.
If I am carrying more weight or towing, I will inflate the rear tyres to 29.
Under inflation is terrible for longevity, handling, and safety. You should maintain proper tire pressure.
So is over-inflation. Always inflate to the correct pressure as per the placard. If you are driving in unusual conditions,
My little Jimny weighs bugger-all but needs Light Truck tyres. On-road pressure is a very light 26 PSI. If I am driving through Sand, Mud or Snow I will deflate to an appropriate pressure and drive slowly. If I am driving over rocky terrain, I will also deflate to an appropriate pressure for better adhesion.
As soon as I hit the Tarmac again, I will reinflate back to 26. If I am carrying more weight or towing, I will inflate the rear tyres to 29.