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I use 32psi all round, and it feels tight, but not with too much road noise. I guess you should check what is written on your tyre?

I'm not sure about the 40psi mark... sounds like over-inflating when you're talking about stock tyre dimensions?

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Car manufacturers give recommended tyre pressures that are best for the smoothest ride, not the best handling.

If you like a nice smooth ride, put them to 32psi.

If you want the best handling put it up high like Duncan said around 38-42psi. I always have my tyres at about 38psi.

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There are 2 main things that happens with higher tyre pressures:

1/ Much firmer tyres, basically the same as fitting firmer shocks.

2/ Less tyre wall flex which is more important on high sidewalls like stock ones. Less difference with big rims/low profile tyres.

I took my old gtst (king springs, 10psi boost, otherwise stock, and with a passenger) around Eastern Creek in 1.57 on road tyres (Falken fk451) at 42psi

Of course it is all totally different with race or r tyres, they have very strong sidewalls and tend to be designed for 30-35 psi hot.

Like shyster said, manufacturers want comfort, not performance :)

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  • 2 weeks later...

Yeah, I've noticed the same thing. I usually run about 33-34psi in mine (stocko rims/tyres) and I've found that the ride's really good, but the handling sucks; it rolls on the rims. But at higher pressure the corners aren't so hairy, so yeah I'd be going up around 38psi for handling... but for everyday use, the 32psi would do you just fine.

Car manufacturers give recommended tyre pressures that are best for the smoothest ride, not the best handling.

If you like a nice smooth ride, put them to 32psi.

If you want the best handling put it up high like Duncan said around 38-42psi. I always have my tyres at about 38psi.

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