Pontiac 1958 Safari Owner's Manual page 25

(jeneral Service
TIRES
OVER INFLATION UNDER INFLATION PROPER INFLATION
Fabric Breaks-Bruises Blowouts-Loosens Cords More Mileage-Even Wear
Poor 'fraction-Hard Ride Uneven Wear-Runs Hot Good Traction-Gond Ride
GET MAXIMUM SERVICE FROM TIRES
BY KEEPING THEM PROPERLY INFLATED
TIRE SIZE
Startlne Pressure City Pressure Highway Pressure
(after car has (after driving (after driving
been standing for car three miles car three miles
three h o urs) or more below or more above
40 m p h) 40 mph)
8.00
X
14-4 ply
221bs. 251bs. 271bs.
8.50 x-14-4 ply (Except Safari &
Air Conditioned Cars)
20 lb •. 231bs. 251bs.
8.50 x 14-4 ply (With Air Con-
ditioned Cars Except Safari) 221bs. 25 lb •. 27 lb •.
8.50 x 14-4 ply (Safari)
241b •. 271b •. 29 lb •.
The only way to get the most from your tires is by keeping them
inflated to the RECOMMENDED pressures when cold. Under-
inflation or over-inflation reduces tire life and safety; over-inflation
also reduces comfo;i. However, do not bleed air from tires when they
are warm or hot even though the gauge reading is higher than the
recommendation, since this could lead to under-inflation when they
become cool.
122J
CHANGING TIRES-It is a good
idea to remove the spare tire from
the trunk compartment when the
jack and handle are removed. The
jack base is used as the spare tire
clamp.
1.
Set the parking brake securely
(block front wheels if rear end is
to be raised) and pry off the
hub cap. The end of the jack