Psi

[AmoS500]

Hi, Should the PSI on a tyre be changed if larger tyres are used?
I have changed from 16" to 18" wheels and 205 to 255 tyres.

Do the manufacturers specs on PSI remain the same for the 255s?

thanks

 

[BlackC55]

Just use the same tyre pressures as before in the fuel filler cap.

 

[television]

As above they stay the same

 

[100%Bitch]

Keep them the same as before. :lol:

 

[Xtractorfan]

Whilst most people will say keep them the same, there is some debate about the merits of this, broader tyres tend to wear in the centre simply because the center is the weakest part of the tyre ..and will tend to bulge..slightly .. have a look around some of the tyre manufact websites and some of the modified cars sites and see what they say..

 

[rf065]

The latest Haynes manual for Mercedes advises,

"The recommended tyre pressures for each vehicle are given on a sticker attached to the inside of the fuel filler flap. The pressures given are for the original equipment tyres - the recommended pressures may vary if any other make or type of tyre is fitted. Check with the tyre manufacturer or supplier for latest recommendations."

To state that the pressure always remains the same regardless is not good advice in my opinion as every car I've ever had quoted different pressures for each wheel/tyre option/size available from the factory for that model.

Russ