Tyre pressure

[Nicho]

I have the sports pack with 17" Bridgestone Potenzas. Car came with 51psi which is the max recommended on the tyre. Fuel cap suggests 230 2,3(33psi?). Do I assume is for 16" standard wheels or does it apply to the 17" as well? If not then what should be the pressure?

Thanks!

[thamwk]

erm... you might have read wrong... 50PSI is something you would put into a bicycle tyre, and not a car tyre. ~33PSi sounds just about right for 17" with people filling it to 30PSI for a balance between comfort and grip.

[logger]

...Do I assume is for 16" standard wheels or does it apply to the 17" as well? If not then what should be the pressure?

Was discussed here at Tyre Press on Golf 6 thread. The way I read that label VW recommends same press for all three tyre sizes. Varies only with load.

[Umai Naa!!]

Run them at 38, and enjoy the fact that you'll get decent life out of them

[Nicho]

Thanks for the link logger.

Checked the pressure again and it was at 50!! I have not looked that the tyres since taking delivery. Pretty average to have them delivered like that.....

I have just dropped to 38 and will see how it feels.....excuse my ignorance on the subject Umai Naa but why 38 vs 33???

[thamwk]

not sure why the exact figure of 38psi, but basically, with more pressure, you have less of the tyre in contact with the road, as compared to a tyre with less pressure. as long as the tyres are rated to take that pressure, then there's no harm there, though your ride would be pretty harsh.

p.s. not even going to ask why they delivered your car with 50PSI in the tyres

[Umai Naa!!]

They seem to last longer in the high 30's. Run them too low, and they chop the egdes out.

50 is waaay too high. They don't even roll off the boat with that much in them!

[logger]

...They don't even roll off the boat with that much in them!

Unless someone/thing forgot to let them down after seating the beads. But unlikely for all four tyres I guess. In any case pre-delivery should have pickedthis up.

[bwen]

Checked the pressure again and it was at 50!! I have not looked that the tyres since taking delivery. Pretty average to have them delivered like that.....

Did you check your tire pressure in the day? (heat?) air expands in heat so it would give a higher reading than normal

[logger]

At around 1 psi per 10 degrees it would have to be as hot as hadies to make that big of a difference though.

BTW I just stumbled on this in the erWin VW Maintenance manual...

"The tyre pressure table is valid for standard tyres and for all tyre sizes fitted at the factory.

The pressures in the table apply to cold tyres. Do not reduce increased pressures of warm tyres"

[Nicho]

At around 1 psi per 10 degrees it would have to be as hot as hadies to make that big of a difference though.

BTW I just stumbled on this in the erWin VW Maintenance manual...

"The tyre pressure table is valid for standard tyres and for all tyre sizes fitted at the factory.

The pressures in the table apply to cold tyres. Do not reduce increased pressures of warm tyres"

Thanks logger......so I should add a couple of psi to compensate for global warming???

[thamwk]

i was just doing a quick calculation and an increase of temperature from 20C to 40C will account for approximately 6% increase in pressure so to get 50PSI, we would be looking at an approximate increase of 500+ degrees C

[GolfAtom]

Could be your pressure gauge is out of calibration. I have four different pressure gauges and they vary as much as 8 psi between them.

[geojack555]

Right tyre pressure

Hi all
Just wondering what is the right /optimum tyre pressure for 16" 205/55?
I got a mk6 118tsi.
I was checking the existing tyre pressure from a gas station to see if I had to fill in, but was surprised to see when it showed 34 or 35 Psi reading! I believe the last time, it was filled by VW dealer/service centre. I then lowered it to 32 psi.

[schoona]

Hi all
Just wondering what is the right /optimum tyre pressure for 16" 205/55?
I got a mk6 118tsi.
I was checking the existing tyre pressure from a gas station to see if I had to fill in, but was surprised to see when it showed 34 or 35 Psi reading! I believe the last time, it was filled by VW dealer/service centre. I then lowered it to 32 psi.

What does the manual say?
Higher pressure you can reduce fuel consumption at the expense of "less grip" with a lower pressure.
Lower pressure you walk around on the sidewall (being high profile 205/55s) and induce increased wear.