Tyre Pressure for my Prius 2008

Don't be. The manufacturer spec for Prius generally is 35 / 33 psi front / rear. If your car has a manufacturer label that shows 36 / 33 for your model, then that is the spec for your car. I use 42 / 40 psi.

30 psi is way too low unless you want to wear out your tire tread shoulders much sooner than they otherwise might.

 

Double check that label? North American ones say 35/33, front/rear. Still, what's a pound or two? For my 3rd gen 17" the label says 33/32. I set all four to 36, leave it till they get down to around 33~34 to adjust again.

I don't like to go too high. For one thing the 17's ride harsher, at any pressure, and more so when raised. Also, I suspect higher pressures are going to accelerate wheel bearing and suspension wear.

I also go over speed bumps at dead-slow.

 

just set mine to 42f/40r after returning from florida, and leaving them at 50 psi to prevent flat spot.

but my door says 35/33 as well

 

aint google great? and wiki

 

Do you have the touring model? (16 inch tires?)

 

Stick with the door jamb, and maybe experiment a bit too?

Keep in mind: your gauge(s) might be off a pound or two. I've got 3 stick gauges, and they're each about 2 pounds apart, lol.

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