It depends on what it is mounted on, and maybe what position,
but 30 psi (207 kPa) is not a bad guess.
The proper tire size for a 1998 Pontiac Transport is P205/70R15. This info is on a sticker placed on the driver's door jam.
The correct tire pressure for a 2000 Chevy Venture is 32 psi front and rear. This is for the original tire sizes of P215/70R15 front, and P225/60R16 rear.
My Sedona takes a P215/70R15 tire. It also is on the tire itself. Check the passenger door/jamb for the tire size and air pressure on the factory label.
P215/70R15 or P205/70R15 will work as well
The proper pressure depends on the tire itself. The recommended tire pressure is stamped on the sidewall of the tire beside the load rating..
There is written on the side of the tire, the maximum tire pressure you can inflate the tire to. But the proper pressure depends on what vehicle you install the tire on. Look on the driver's door post of the vehicle or in the owner's manual.
If there is enough clearance for the wider tire, yes.
P225/70r15
P205/70R15
p215/70R15
265/70R15
P225/70R15 100S P225/70R15 102Sfound @ michelin site