Greg:
The tire pressure is specified to give the correct sized contact
patch under each tire. The pressure depends on the weight of the
vehicle, the size of the tire, and load.
205/70-R15 are 20 mm wider than stock (stock 185-15 tires would
be about 185/80-R15), so all other things being equal they will have a
wider contact patch.
At the stock tire pressure, the contact patch will be wider and
shorter than the original since the vehicle weight has not changed (i.e.
the area of the contact will remain the same). If you increase the tire
pressure, the contact patch will diminish in size, which is probably not
what you want.
I would suggest for starters that you begin with the original
recommended tire pressure, as this will give the correct size contact
(at least the originally specified contact patch). All IMHO, of course.
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Greg Perry
Sent: August 17, 2005 10:09 AM
To: 6pack@autox.team.net
Subject: P205/70R15 tire psi
Hello,
What tire psi for the front and rear for P205/70R15 tires are
recommended for street driving/ daily driver with stock suspension and
wheels? I will run a maximum of 80 mph on the highway.
Does one use the maximum load pressure of 20 psi front and 24 psi rear?
I am curious since the tire technology has increased since the 70's.
Thanks,
Greg Perry
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