Tyre Pressure

The Guvnor

I drive a VW Touareg.

255/18/55's on it.

Where should I be on pressure?

Sill says one thing.
Tyres something else.
Mechanic has his view etc.

Unfortunately I do a lot of mileage - with weight in the car - not huge but usually some stuff in the boot - could be 100kg or so etc.

How fast would you expect to lose pressure in the tyres? Mileage terms as I could be doing 3-4k miles per month.

Zen 2nd

My 2 cents: You can lose tire pressure when there is a temperature change from hot to cold, so you won't be able to base it just on millage.

Good practice is that you should check it once a week and before you drive so that the tires haven't warmed up. You can buy a cheap tire pressure gauge in most petrol stations.

Not sure what tire pressure you should have them at, but I would use the tire pressure recommended in your car manual for the weight you have specified.

wexie

The Guvnor wrote: »

Sill says one thing.
Tyres something else.
Mechanic has his view etc.

Is the number on the tyres themselves not a maximum number?
Also I'd have thought that as far as a Touareg is concerned 100kg really wouldn't be worth mentioning?

Unless you're carrying 4 adults as well

The Guvnor

45 psi is what is the upper limit.

Car has usually 200kg of people in it and 100kg-200kg in goods etc.

Must get a tyre pressure monitor.

They were pumped say 3 weeks back at 40psi all around and two days ago I checked them and they ranged from 27-33!

27 - offside rear
29 - nearside front
33 - offside front
31 - nearside rear

It was a lovely day that day but still...

About 3000 miles done since they were at 40psi.

H3llR4iser

Refer to the car's owner manual, it will tell you all you need to know - including recommended tire pressures for different situations, usually normal load and full load - and by full load, they mean right to the car's carrying limit.