What tire pressure?

[cappuccino]

What tire pressure do you guys find is best?

got the standard 16" alloys from 2012.

dealer had it at bloody 40 psi which seemed too high. some websites say 27? that sounds too low

[Diesel_vert]

The car should have a sticker in the fuel flap that lists the manufacturer's recommended inflation pressures.

[cappuccino]

The car should have a sticker in the fuel flap that lists the manufacturer's recommended inflation pressures.

thanks, missed that since it was in KPAs, had to convert it, ended up as 32psi 30psi, I went for 34/32 since it was already close to that and felt a bit too flat.

[vdubmotorworx]

Stick with what the fuel flap sticker says and then monitor over time the tread wear....VDUB...

[wai]

What tire pressure do you guys find is best?

got the standard 16" alloys from 2012.

dealer had it at bloody 40 psi which seemed too high. some websites say 27? that sounds too low

It is not the wheel size, but the aspect ratio of the tyre that is important. Use what the placard says. Lower profile tyres require higher pressures than the normal (70% or 80% aspect ratio) ones.

I check my tyres when I fuel up and I am amazed at the number of times I find the system set to 32 psi. It is almost as though it is a rule carved in stone. Just about every car will have 60% aspect ratio tyres or lower these days, and these tyres need higher pressures because there is less air in the tyre to support the load.

Many drivers do feel unsure about higher tyre pressures, but this is because we had so many years with 70% and 80% aspect ratio tyres and then passed on the 32 psi figure on down the generations. The tyres are designed to cope with these higher operating pressures.

[pologti18t]

I check my tyres when I fuel up and I am amazed at the number of times I find the system set to 32 psi. It is almost as though it is a rule carved in stone. Just about every car will have 60% aspect ratio tyres or lower these days, and these tyres need higher pressures because there is less air in the tyre to support the load.
.

That's because the system automatically resets itself to 32psi

[wai]

That's because the system automatically resets itself to 32psi

Only if the reset is on a a timer.

Either way, even 32 psi is way under what low profile tyres need to be inflated to.

[pologti18t]

Only if the reset is on a a timer.

Either way, even 32 psi is way under what low profile tyres need to be inflated to.

It is reset on a timer... seen it reset itself. It's annoying when it does it as you try to move your motorbike to gain access to the air valve.

32psi is a pretty good average for run of the mill cars. And i find that most of these electronic pumps are set up to under read the actual pressure but a psi or two.

[amazeer]

pressure will vary 1.5 to 2 psi for every 10 degrees temperature change. Whatever pressure you put in your tyres it is going to change constantly depending on temperature of the air, the road, how far/fast you are going, how many red lights you get, how hard you have to brake for them.

[Lemonskin]

What pressure do the GTI owners run? I've been using 37psi, I heard its better to run higher for less tyre wear and less fuel costs

[gavs]

What tire pressure?

Personally I run 36 front and 38 rear but I also ignore the tyre placard. I have my own reasons for running the pressures I do

[Diesel_vert]

What pressure do the GTI owners run? I've been using 37psi, I heard its better to run higher for less tyre wear and less fuel costs

The car should have a sticker in the fuel flap that lists the manufacturer's recommended inflation pressures.

There's no pressing need to deviate from the manufacturer's instructions or specifications unless you wish to alter the car's dynamic behaviour.


The figures listed on the sticker are for "cold" tyres (i.e. tyres that are have been stationary for a few hours and at ambient temperature).

If inflating the tyres while they're warm, you should add an extra 2-4 psi to compensate, depending on how far or long they've been driven on.

[GTD_XU1]

I run my GTD at 40psi all round if I'm off for a highway run, which is often and 38psi around town for a little extra comfort for passengers. Present tyres are P7 Cinturato 225/45 on 17inch standard rims.

[MountainBikeMike]

What pressures would one recommend for some high speed flowy and tight corners on a mountain run? Or should I say, how many psi would be beneficial to differ from manufacturer/tire shop setting?

I take it that grip would be enhance with a few psi less, for the sake of additional tire wear, but at what point does it become unsafe, un-fuelly, and drastic tire wear?

Really I do want to save fuel, ESP on cruises, but YOLO More grip is more grip Running Michelin SP3's 235/40/18x8

[Diesel_vert]

What pressures would one recommend for some high speed flowy and tight corners on a mountain run? Or should I say, how many psi would be beneficial to differ from manufacturer/tire shop setting?

Accurately set the manufacturer's recommended inflation pressure, then fine tune to your liking.

... with a few psi less... at what point does it become... unsafe?

This will obviously differ from vehicle to vehicle, but generally, tyre underinflation becomes unsafe when:

- the handling and stability of the vehicle is adversely affected

- the inflation pressure is so low that the tyre cannot safely support the weight of the vehicle, since the load capacity [kg] of a tyre is proportional to inflation pressure (up to its maximum rated load capacity)

- the tyre overheats

All of which may lead to internal (cannot be seen unless the tyre is unmounted) or external structural damage.

Really I do want to save fuel, ESP on cruises, but YOLO More grip is more grip Running Michelin SP3's 235/40/18x8

If you want more grip, you should consider purchasing a set of road tyres that puts a disproportionately high emphasis on grip (at the cost of treadwear), such as the Bridgestone Potenza RE-11A, Dunlop Direzza II, Yokohama Advan AD08R or equivalent.