Air Down To The Right psi.
Sand and Tire PSI:
sand a tire inflated to normal highway/street pressures will sink and dig into
soft sand instantly.
Highway tire pressures may be alright on hard packed sand
but the second the wheels start spinning the vehicle will get bogged very
Tires deflated to lower pressures will increase the foot print of the tyre
itself, every 4 psi less will increase the foot print noticeably.
deflating the tires with fast deflators you can actually see the tyre foot
print growing by the second.
Most 4 wheel drives will find that a tire psi of
about 14-18 is good enough for most soft sand driving, in some cases lower
pressures may be required. The idea is to find the perfect pressure that allows
the vehicle to float over the sand.
How low a tyre pressure can you go in sand?
lower than 10 psi comes with a big risk of rolling the tyre of the rim, usually
caused by turning at speed.
Sometimes there is no choice but to lower even down
to 7 psi just to get out of a boggy situation, if this is the case, inflate the
tire pressures back up to at least 10psi ASAP.
Only use low tire pressure for off roading, a low pressure on the highway is
downright dangerous and will cause damage to the inside and outside of the
Tire pressures on other off road surfaces.
roading and low tire pressures will assist majorly in traction and will prevent
track damage, tyre damage and wear to the 4x4’s driveline.
The bigger the foot print the more traction there will be as more rubber
surface is in contact with the terrain, this also makes it harder to spin the
wheels which will prevent track damage.
The lower the psi the softer the tyre will be which means the ride/drive over
any terrain will be more comfortable and less wear on the 4x4's suspension and
vehicle itself. This is because low tire psi will allow the tire to mold around rocks, tree roots, sticks, logs, potholes and sharp objects.
too much pressure will just spin and/or puncture.
Off road tyre pressures will depend on the terrain in question, see terrain conquering for more detail.
Photos of a tyre at
Notice how the footprint increase in size:
Tire psi and corrugated roads.
Badly corrugated roads can literally rattle a 4 wheel drive
apart by loosening bolts, screws and other tie downs.
Reducing the tire
pressures will help to soften the ride and reduce the rattling.
It is very
noticeable how much of a difference it is to the vehicle and ride when combined
with the right speed.
This is an important item every 4 wheel driver should have,
for more info on the different types of tire deflators see Tire