Tyre pressures ?

[northy]

I used to run 165 80 R13 tyres on the skoda with a pressure of

F 21psi R 28psi

I now have a set of 175 70 r13 tyres on as costco didnt have the right size.

What pressures should i run on the new tyres ? Standard or experiment with my own settings to find the best ?

Is there a online web page which can adjust the pressures for a non standard vs standard tyre ?

[J o n]

run em at the same, pretty much the same size, you've only swapped 1cm round from profile to width