- G'day, I'm Jared, from
Tyre Review Australia
and today we're actually
gonna be looking at
what tyre pressures you
should be running in the sand
and we're not gonna be
just talking about this,
we actually gonna be demonstrating it so
we've got David from
Performance Driving Australia
here in our Toyota Hilux,
which has the Yokohama Geolander
all terrain tyres on it.
These tyres are currently inflated
to 24 PSI in the, in the back
and 32 PSI in the front.
Which is the factory specs.
Some people do run higher
pressures than these
but this is what the factory says
so we'll start off with that.
We're actually gonna to
see if we can run the car
up that hill.
So David, what sort of settings are you
gonna run today?
- I think we'll just keep this
fairly simple so we'll
keep the car in four low,
we'll have it in power mode so
it allows the extra torque of
the motor to worth a car
a little bit more easily
but other than that we won't switch
anything else and we'll just let the car
do its work.
- Easy, switch her on see how you go.
All right, go.
- Roger.
(car engine roaring)
- Oh he's not making
it, he's digging a hole.
Oh dear, so he's got about halfway up.
So David, you only made
about halfway up that time.
You wanna have another go
at the full factory specs?
- We'll have another go and
we'll just see whether or not,
now we've pushed a bit of sand down,
whether it tracks a little bit better.
- Yep, all right.
So factory pressures, take two.
(car engine roaring)
(dramatic music)
- About the same spot right there.
Car's still straight, feels good,
just can't get enough grip
on the sand unfortunately.
It's a momentumer.
[Dramatic music]
- That's about as good as it gets.
I'll keep the car straight,
leave it fall back
down in its own tracks.
Keep good momentum up
so we don't bury in the
bottom of the dune.
And try not to run anyone over.
- So we've just run this
car up the hill with
factory pressure, so 34 in
the back and 32 in the front,
and it made it maybe
a third of the way up.
We've just lowered the
pressures down to 25 psi.
Let's see how it goes.
Go!
(engine roaring)
(dramatic music)
- I definitely got a
bit further that time,
by a couple of metres.
It felt like it hopped up
a bit more quickly onto the
top of the sand as well.
There's pretty trying conditions in here.
Very soft sand and very warm.
- 25 psi, take two.
Go!
(engine roaring)
(dramatic music)
- Definitely got a bit further that time,
by a couple of metres.
- 25 psi, take three.
(car engine roaring)
(dramatic music)
- Yeah, about the same point again.
Lovely and consistent.
- Okay, we're now at 16 psi which is the
minimum recommended
pressures by the experts
for driving on sand,
So David here from PDA
is trying to get up that
hill at 16 psi.
Take one.
(car engine roaring)
(dramatic music)
- Ooh, almost.
Almost got up the top with no run up.
- Okay, so he got three
metres further on take one.
okay so this is 16 psi, take two.
(car engine roaring)
(dramatic music)
- We're probably divvying
out in furrows now.
We might try a little line off to one side
so we don't dig holes quite as big,
but it's certainly easier to get the
car moving backwards and
forwards at the moment.
- Okay, 16 psi, take three.
(car engine roaring)
(dramatic music)
- Go on, you good thing,
come on you good thing.
Come on.
Come on.
(car engine roaring)
- So at 16 psi on the last attempt,
he actually made it to the top and I think
it's just about run over one of our GoPros
but this is a proof that you
really need to be running
a low pressure in the sand dunes.
So David, you made it
to the top of the hill,
16 psi, the factory
recommended pressures just
didn't cut it.
You got maybe halfway up the hill,
a third of the way up the hill.
We went down to 25 psi, that
got two thirds of the way
up the hill and then even
on 16 psi you only made it
on your third attempt.
So it just shows how sandy,
and obviously it's sandy,
but it's how powdery this
sand is and how difficult
that actual hill was.
- Sure and the idea of
the test was to actually
put it under an extreme
circumstance to see what it does.
With a little bit more momentum it would
have been a bit easier but at the same
time it's a fairly steep and arduous
dune to go up.
Most people might choose
to find another way around
but certainly the changes
in pressure just make the
job a lot easier.
- That's right.
So lowering the pressure
makes it easier on the car,
makes it easy on you as the driver,
and it just makes it easier in general
because people don't have
to come and pull you out
when you get stuck.
- Correct.
- Good.
Thanks David.
- No worries.
- Cheers.
