El Paso herald. (El Paso, Tex.) 1901-1931, 1914-01-10

~ HERE are so many different factors
having an influence on the uses
Of tires that no rule for inIlalloH
can be adopted which will be eAs
actly suitable to all conditions, STYLE u
car construction the weight ana us Sll9t -
button Dower road conditions, speed tllo
expert or careless driver, effect OF cilIlae9
and numerous other things all nave ~ -
pOrtant connections with the strains
which the tires will be subjected Coh9iI
quently a fixed rule for initiation Woulu' -
view Of these things produce dlfterehI
suits. zo5
by the tire companies provide pasIs
from which to work Ordinarily the III
on front wheels should be inflated from -
to Is lbs per inch of tire section ana ~
rear tires from Is to 20 lbs; per me- t,-ee
tire section. For example: Four men ~ ~
on front wheels from 60 to Y pounds, an an
the rear so to so pounds. me NslIlatLo 49,,
in these pressures naturally depends up 'J
the things before mentioned, princlpally
the weight of car For instance-tires on
a car weighing 1900 pounds do not require
as much air pressure as the tires on d -
weighing $500 pounds The tires ride mar
used on light cars, but with the same PlF9
sure ride comfortably on heavy car
Know a Cars Weight.
In determining the correct size OF Lto
and the proper initiation, it is important "
s know the weight of car and its dlstr4 LOU,
ton on the front and rear wheels. Kun
front half OF on platform scales anu
make note Of the weight Then place OiIIy
/ the rear half Of car on scales RECORDING
| this weight also The weight carried by
each tire will be one-half Of either OF the
respective amounts
ResiIiency is primarily governed by the
construction and quality of the tires, but y
weight carried. A four inch tire inflated
( to 20 pounds pressure, and carrying q
weight Of 500 pounds will naturally rice
/ easier than the same size tire with ne
same Initiation carving a weight OF zoo
I pounds The heavier weight causes some
| detection Of the tire on the ground and IN
/ creases the action adding to the comfort OF
/ the ride. As the detection or tlattenlns
I Of the tire is increased either by weight
/ or reducing the air pressure, most OF tne
/ vibration is absorbed by the tires ana noL
! by the springs Of the car. The danger IS
{ in going to an extreme, and a great many
! car owners, in this way, sacrifice tire
efficiency and maximum mileage.
When to Reduce.
If you find the tires ride hard when IN
I flated to so pounds pressure, II IS sare %
/ reduce the pressure to IS pounds or 40
pounds. providing this does not permit the
/ tires to bulge or flatten under the weight
/ OF the
/ the initiation from appearances; use tire
/ pressure gage at least once every week
I the tires sometimes appear to round up
pretty we'll but when tested with gage you
may find the pressure is entirely too low
/ to secure best results
Soft Riding Hurts Tires.
A great many tires are damaged IN
number Of ways from riding soft This
I particularly is true during the sumner
( season. IRE users seem 10 De uAtLEA lALo
! impression that there is danger Of blow
outs due to expansion. There is some ex-
pansion, but a matter of fact 1t Is not
in proportion to the increase in tempera-
ture. For example: If the temperature OF
the air in tire increases from so degrees
to so degrees it does not mean that the
air pressure per square inch increases from
60 to so pounds. With the change in tenn
perature mentioned. it actually results in
an increase of three pounds pressure per
square inch, (. e., II the temperature Of the
air in a tire increases from so degrees to
so degrees the air pressure increases from
60 TO SO pounds
Heating the Tire.
On a hot day 1t will be observed that
driving a tire soft for some distance over
/ a pavement will heat it considerably more
( than the tire upon the opposite wheel, in
! flated to a higher pressure. This IS caused
naturally by the increased bending in the
! sidewalks Of the soft tire. and the increased
road friction due to deflectiOn-the eX-
/ cessive bending and heating is detrimental
/ in many respects. The DETECTION and wave
/ in front OF the tires requires more power
] from the engine. The kneading action re-
/ suits in separation Of the rubber cover from
/ the body and the several plies Of fabric