Rear tyre wear gti

[benough]

Bought 4 tyres the same time. No alignment for for a
Couple of yrs. Will that help? My steering is pretty straight with no hands.

A couple of years, yes. Driving over a "silent cop" at an intersection will put it out.

I'm lowered and drive "well" and my tyre wear is very even because of the frequently rotation and inspection.

[Diesel_vert]

The figures stated on the tyre placard usually lean towards comfort, as opposed to real-world preferences like fuel economy and tyre wear.

I often see that phrase bandied around many forums, though I've never seen any justification for it - but I have my own theory about it.


Motorists often adjust their pressures without compensating for temperature and unknowingly end up with underinflated tyres.

For example, having driven the vehicle to a servo, I see people adjust their tyre pressures according to the placard (say, 35 psi), which is very commendable indeed. But upon cooling down, the pressure would drop back down (to 32 psi), which is insufficient and hence underinflated - and also has the side effect of producing a softer ride (sound familiar?), as well as all the usual drawbacks.

I'm also of the impression that, unless stated otherwise, people who say they prefer to add 2 - 4 psi to the manufacturer's recommendations are just unknowingly compensating for temperature when they top up their pressures.

Hence the origin of that phrase.

[doink]

Also note that the above values are for when tyres are cold. Gases expand when heated, so expect an increase in pressures when warm. Therefore, if you top up the pressures after the vehicle has just been driven, you should generally add 0.2 bar (3 psi) to your desired cold pressures (i.e. 35 psi cold = 38 psi warm).

Is it better to check tyre pressure at normal operating temperature (warm after some driving) or when cold?

[Diesel_vert]

Is it better to check tyre pressure at normal operating temperature (warm after some driving) or when cold?

For a passenger vehicle for road usage, I would say it's easier to check tyre pressures when cold - for reasons of simplicity, as the values on the tyre placard refer to cold pressures.

Unless you're at the track, and you have a tyre pyrometer, and you know how to interpret the readings, there's little point in second guessing what the hot pressures are (unless you're at the track and you don't have a pyrometer, heh).

Basically, the whole point of this exercise is to ensure the pressures never fall below the values on the tyre placard.