Mazda 1978 GLC Instructions; Maintenance And Servicing page 61

WHEEL AND TIRES
1. Tire Pressure
Tire pressures should be checked weekly, when the
tires are cold. It is important that corret pressures
be maintained for the bestride, handling and tire wear.
Note:
It is normal for tire pressures to exceed spacifica-
tions when tires are warm. Do not lower tire pressures
in this situation.
Recommended Cold Tire Inflation Pressure
Tire size
Wheel size
Front and rear
(Tubeless)
155SR13
155-13/
4 > >-J x 13
26 psi
6 .15·13-4P.R.
175/70SR 13
5-J
x
13
(psI - pounds per square inch)
If you need snow tires, select the same size and
construction as the front tires.
Snow tires should not be operated at sustained speeds
over 60 mph (100 km/ hl. These tires should always be
inflated 4 psi (0.3 kg/em') above the recommended
pressures shown on the tire pressure chart, but never
exceed the maximum cold tire pressure shown on
the tire sidewall.
Note:
Do not install studded tires without first checking
local regulations for possible restrictions.
2. Tire Care
Carefull inspection is recommended at every oil change
and before long trips. Check for cuts, bruises, sharp
objects imbedded in the tread, and proper inflation
pressures.
3. Tire Rotation
To equalize tread wear, it is recommended that the
tires should be rotated every 6,250 miles (or sooner
if irregular wear develops) as indicated in either
diagram below and the same time checked for correct
balance.
Bias and bias belted tires
Radial tires
7-17