Harrisburg telegraph. [volume] (Harrisburg, Pa.) 1879-1948, 1917-08-04
TIRE SELECTIONS
AS TO STYLES
Firestone Expert Gives His
Views on Various Kinds
of Tires

The application. care and usage of
tires are necessary things to con-
slider. but It is essential to good serv-
ice that the correct type and size be
adopted. Car construction. power,
lateral strains and traction strains
to the tires must be kept in mind
when deciding upon diameter and
cross section of tire equipment, but
! the weight of the car is probably the
most important thing.
In selecting the tires for car.
consult your tire dealer. who will tell
you the proper size for the weight of
the ear.
Much delay and annoyance can be
avoided. when ordering new tires,
by specifying the style. Regular
clincher cases have stretchable beads
and are designed for use on regular
clincher Gone piece) rims; they are
sometimes used also on quick detach-
able clincher/ rims. When used on
regular clincher rims. it is desirable
for sizes including the 4-inch and
above to use clips or stay-bolts to
hold beads securely in rim clinches.
When using regular clincher tires on
quick detachable rims. it is necessary
to use flaps to protect the inner
tubes.
Quick detachable clincher cases
used only on quick detachable clinch-
er rims and the split type of clincher
rims. This style of tire should al
ways be equipped with flaps.
Straight side or straight bead cases
have nonstretchable cables imbedded
in the base and are designed only for
quick detachable straight side rims
and split type of straight side rims.
This type should always be equipped
| 4, HaV f.wI.E ,t IL tEAa nrn
sometimes used on quick detachable
clincher rims having filler beads in
clinches of rims. This is not to be
recommended, however. as the base
width of this style of rim is not suit
able for straight side tires.
Here q word should be said about
the new cord tires Just becoming pop
ular among discriminating buyers.
The greatest enemy of the pneumatic
tire is internal friction, which gene
rates heat and causes the rubber to
deteriorate. 1t has been the constant
aim of tire manufacturers. ever since
the pneumatic tire was developed. to
eliminate as much of this friction as
possible. The cord tire is the result.
1t has long been realized by tire
engineers that the continual flexing
of the tire walls as distractions in
the road are met causes the threads
of the fabric to rub together where
they cross, causing destructive
heat. The obvious way to get rid of
this friction is to use fabric" in
which the threads do not cross. This
| is Just what the engineers do in
| making the cord tires. The fabric"
is made of one layer of cords all run
ming in the same direction each cord
completely surrounded by rubber.
| The cords do not touch each other at
any point. In building up the body of
| the tire; the fabric" is laid so that
the cords run diagonally around the
tire. the alternate layers in opposing
directions.
Tires made in this way far outlast
the regular fabric tires and are more
resilient. This latter advantage makes
them the tire to select when speed.
power, economy and comfort are de-
| sirable.
Oversize tires were primarily de-
signed for exceptionally hard service,
but have come into general favor be-
cause of extra strength, easier riding
cushion and longer mileage, in fact
experienced car owners specify the
| oversize tires, in many instances, for
original equipment of new cars. The
resiliency of larger tires reduces the
traction slippage on rear wheels, adds
| the mechanism of the car.
When oversize tires are placed on
front wheels that were originally
equipped with regular size tires. the
overall diameter will be increased
approximately one inch and the
speedometer should be readjusted
| otherwise the mileage recorded will
be less than that actually Travelled.
There Is not enough added weight
in oversize tires to affect transmits
sion or differential or make any OBJ
| jectionable difference in the power
| The advantages of oversize tires
without the inconvenience or expense
of changing wheel equipment, are fea-
lures which mean more certainty and
pleasure to motorists.
Following is table OF oversize
tires:
| PapuIar Straight