Buick 1993 Roadmaster Owner's Manual page 276

After the tires have beers rotated, adjust the front and
r e a
inflation pressure
as
shown
on
the Tire-Loading
Information label. Make certain that all wheel nuts ax9
properly tightened. See "Wheel Nut Torque" in the
'
..
Index.
A
CAUTION:
Rust or diir on a wheel, or on the parts to which
it
is fastened, can make wheel nuts become
loose after a time. The wheel-could come off
'and cause an accident. When you change a
wheel, remove any rust or dirt from places
where the wheel attaches to the vehicle. In an
emergency, you can use a'cloth or a paper towel
to do this; but be sure to use a scraper
or
wire
brush later,
if
you need to, to get all the rust
--
dirt
off.
(See "Changing a Flat Tire" in the
Index.)
I
When It's Time for New Tires
One way to tell when it's
time for new tires is to.
check the treadwear'-
* .
'
indicators, which will
appear when your tires have
only 2/32 inch (1.6 mm) or
less of tread remaining.
I
I
. '
DU
need
a
new tire if
You can see the indicators at three places around the
tire.
You can see cord or fabric showing through the tire's
The tread or sidewall is cracked, cut -or snagged deep
rubber.
enough to show cord or fabric.
The tire has a bump, bulge or .split.
274