Recommended tire pressure (215/40R17)?

[jazzer]

guys,what is the recommended psi for a 215/40 r17 tyres to survive in edsa? ty

[Type 100]

Are your tires mounted on a Jazz? There's a sticker on the driver's doorjamb for that. On my GD1 Jazz the recommended pressure was 32F/30R.

[v6dreamer]

If it is original that come's w/ your car it listed in your door jam.

If not...see the tires recommended on the side wall of the tire.

[jick.cejoco]

If it is original that come's w/ your car it listed in your door jam.

If not...see the tires recommended on the side wall of the tire.

v6
the tire pressure listed on the door jamb sticker( on the fuel filler lid for europen cars, on some asian cars in the glove box compartment and in the owner's manual) are for original tire specs for speed, load, and tire size. if the tire is now equipped with a lower profile tire size, this pressure specs does not apply since the tire is stiffer than the original size and load rating tire. it would have a very stiff ride and reduced road/tire contact. of course the friction surface between the road and the tire will greatly be reduced making it unsafe for stopping. the pressure has to be reduced than as if the car had original tire size. check the tire manufacturer's recommendation for the specific car. and oh, DO NOT, i say again, DO NOT use the tire pressure on the sidewall of the tire. that pressure is the maximum inflation pressure for the tire and not necessarily the pressure recommended for the particular car. if you have doubts about the tire pressure specs, please do not guess. the only contact between your car and the road is about the area of a dinner plate for four of your tires assuming you are using the right tire and using the right pressure. let's play it safe. you can google this recommended tire pressure.
jick
a.s.e. certified master automobile technician
a.s.e. certified master heavy duty truck technician
international automobile technicians' network

[v6dreamer]

v6
the tire pressure listed on the door jamb sticker( on the fuel filler lid for europen cars, on some asian cars in the glove box compartment and in the owner's manual) are for original tire specs for speed, load, and tire size. if the tire is now equipped with a lower profile tire size, this pressure specs does not apply since the tire is stiffer than the original size and load rating tire. it would have a very stiff ride and reduced road/tire contact. of course the friction surface between the road and the tire will greatly be reduced making it unsafe for stopping. the pressure has to be reduced than as if the car had original tire size. check the tire manufacturer's recommendation for the specific car. and oh, DO NOT, i say again, DO NOT use the tire pressure on the sidewall of the tire. that pressure is the maximum inflation pressure for the tire and not necessarily the pressure recommended for the particular car. if you have doubts about the tire pressure specs, please do not guess. the only contact between your car and the road is about the area of a dinner plate for four of your tires assuming you are using the right tire and using the right pressure. let's play it safe. you can google this recommended tire pressure.
jick
a.s.e. certified master automobile technician
a.s.e. certified master heavy duty truck technician
international automobile technicians' network

I suppose I should inject some long explaination here. Anyway, you have a pretty good title as "Two" Master/ Automotive Service Excellence (M-ASE). Das ist von Ihnen nett. Guter Tag.

[wlc]

for me safe pressure is to look at the maximum psi on the sidewall then minus 10%.

ex. sidewall maximum is 40psi minus 10% is 36 psi. the start playing from 36 psi. i think 34 to 35 psi is good

[isa1023]

Good thing I found an existing thread for my query.

What could possibly be the ideal tire pressure for the ride?
I'm concerned since both have 17s.

215/45R17 (Westlake tires) on Sentra GX
Current psi: 32F/31R

215/40R17 (Advan Neova AD07) on Astina
Current psi: 31F/31R

I checked the tire pressure recommendations on their door walls but the ratings for the largest rim diameter they gave were for 15s wheels only.