Tyre pressure for 225/40/18?

[Paul81]

As the title says guys.
Can anyone help?

[richw911]

http://www.golfgtiforum.co.uk/index.php?topic=120941.0

[Steve_PD]

I run 32psi all round

[mcgee9t2]

is it not written on the tyre?

[Wayne]

Standard pressures is all I have ever used.

[stevelfc]

32 front
30 rear

[tshirt2k]

As the profile goes lower you should increase the pressure. So it should be higher than standard big sidewall tyres.

[james2]

As the profile goes lower you should increase the pressure. So it should be higher than standard big sidewall tyres.

31 psi is fine all round ,back can be a bit less(29).Tractor tyres are the same. It take 100psi to pop some beads in on cars tyres. Brother works at tyre centre. more wieght you take add more psi 

[tshirt2k]

It doesn't matter who works in a tyre place, most put a average pressure in. It's to do with loadings and weight on the tyre.

Why would a 205/50 on a mk3 be 32 front 29 rear. And a 195/50 is 38 front 35 rear?

Obviously these are higher if vehicle is loaded.

And that info is from the petrol flap of a 16v. Cars with different weights would be different.

I'd suggest looking at manufacture recommended pressures and adjust according to the tyre.

[tshirt2k]

i run 34 front 36 rear

I would have thought it should be the other way round. Unless you have alot of weight in the back.

Pressures should be set to the load rating requirement of the tyre.

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=194