Just had some 19" RS4 alloys and 235/35/19 tyres fitted to my A4 3.0 Cab...
The fitters said the tyre pressure they use was 30psi, which I thought was a bit low, especially as it squirmed and squeaked its way around the forecourt once fitted.
If I thought it was too low then they suggested I up it....so I added another 5 psi.
It seems a lot better but I'm still not sure as it sometimes 'digs' in on corners and I was wandering if I should up the pressures another 5psi to 40psi?
Anybody else got experience with 19 inchers and what pressures work for you?