Tyre Pressure

[dephilile]

Hi

Just a quick question. What sort of pressure should I have in my 18” tyres on my VT? Are the specifications on the inside of the door frame still ok to go by or should it be more in order to keep even pressure on the road since there is less tyre wall?

I’m going camping this weekend and my car is going to be loaded up.

cheers

[1991_Vn2nV]

What size tyres are they and what is the max pressure stated on the tyre?

[dephilile]

The rims are 18”, on the tyre its got 235/40ZR18

The max pressure is 300Kpa/44psi when cold

cheers

[REV-231]

Originally Posted by dephilile

The rims are 18”, on the tyre its got 235/40ZR18

The max pressure is 300Kpa/44psi when cold

cheers

Ive got same rating tyres. Have been running 40psi ever since ive run 18s on all my cars. Im prepared to sacrifice a bit of ride quality to insure my rims dont get damaged.

[dephilile]

Yeah, I’m paranoid about damaging my rims as well.

Do you find you get even tyre wear with that pressure?

thanks

[minux]

i ran 40 psi in 18's for a while, the wear was fine.

[coolvncommodore]

i run about 46psi in my 17s on long trips. On the side wall it says 44psi when cold. My 17s are wearing evenly.

[flyen]

i put 38 in my 18's and havent had a proplem

[Thomas1]

Originally Posted by flyen_vn

i put 38 in my 18's and havent had a proplem

Same here...

[1991_Vn2nV]

3-4 psi below the max stated pressure is a good rough rule of thumb. So I would put 40psi in your tyres.

[Conceive This]

I Work for beaurepaires
and i have done plenty of Tyre technology coarses and this is what ive found.

NOTE: First off remember the tyre placcard on the vehicle is factory fitted
this is the comfort level prescribed by the vehicle manufacturer and is not tyre rated

15'' and 16'' pasanger tyres = 30-32psi

17'' Proformance tyres= 32-35psi

18'', 19'' and 20'' Proformance tyres= 34-36psi

work utes and vans pressure set to 40psi

Now of coarse this is only a guide if you feel its a bit sloppy
you are able to increase these measurements

NOTE: NEVER EXCEED MAX TYRE PRESSURE (located on the side of the tyre)
this is usualy but 50psi

Remember more pressure gives you greater steering response tho can stress the tyres integrity, also there is less give if you hit a pot hole this could cause tyre sepperation (sidewall bubbles) or damage your rims..


NOTE: if you are travaling log distances ie. interstate all measurements should be increased by 4psi this also aplies to fully laden vehicles.

With 4WD

all tyre pressures should be set to 40psi depending on your comfort


Now all these measurments should give you maximum life and proformance
from your tyres...

SAFE MOTORING...

[TWOJZ]

Originally Posted by Conceive This

I Work for beaurepaires
and i have done plenty of Tyre technology coarses and this is what ive found.

and yet you can't even spell performance

[1991_Vn2nV]

Originally Posted by TWOJZ

and yet you can't even spell performance

Or courses. Or several other words

I find every tyre place I go to run tyre pressure that is far too low. They put34 in my 19's!

It might be good for ride comfort, but poor for handling.

[MaN|aC]

Nearly all the tyre pressures are way too low...

I also work for Beaurepairs, I can guarantee I know alot more of tyres then you do
As a floor manager I train my staff to set tyre pressures at

13" and 14" 34psi
15" and 17" 36psi
18" 38psi
19" and 20" 40psi

Even if you are a marketing ploy trying to make people aware of their tyre pressures please give the people the correct information and use a spell checker