wtk proper tyre pressure

[drawersdropper]

hi all i have a set of chrome 18 inch rims with a set of 215 40 18 tyres and i would like to know whats the correct tyre pressure to put in them thanks

[Damien]

28-32psi

[Pinky]

http://forums.trinituner.com/forums/vie ... p?t=296161

[sigma-turbo]

i run 40 psi in my 215 40 17 tyres

[sigma-turbo]

^^ 40??? Thats over pressure to me. What brand are you using? I'm running 215-35-18 and nothing more than 30.

Kumho KU19

[*$kїđž!™]

^^ 40??? Thats over pressure to me. What brand are you using? I'm running 215-35-18 and nothing more than 30.

x2

[Pinky]

The ride with 40 PSI must be hard

[sigma-turbo]

The ride with 40 PSI must be hard

no harder than @ 35psi

lower tire pressure = less cornering grip = understeer

[sigma-turbo]

high tire pressure = oversteer and less braking performance

It will only effect braking performance in emergency stops on a straight road and the difference is very minimal and also varies greatly with tire design


Oversteer is much more controllable than understeer and is only an issue for a novice driver (not saying im a expert)



so yes if you like to brake for hallucinations keep your tires soft if you like to go around corners quick make them harder


Also it comes down to personal preference and the way the car handles before you changing pressure

[*$kїđž!™]

what about the risk of the tyre blowing out?

[sigma-turbo]

what about the risk of the tyre blowing out?

Thats about as likely as the tyre getting pinched from being a little soft

Im still 10 psi under the max inflation and the weight of my car comes nowhere near the load rating on the tyre

Im pretty sure tyre designs are tested to stupidly high pressures like 6 bar or something ? so the max inflation is well within the destruction point