The evening times. [volume] (Grand Forks, N.D.) 1906-1914, 1913-02-20
Tire COST CAN
Be kept down
Much Depends on Handling
Rubber, According to
Those Who Know

Tho tire problem is recognized to be
one OF the most important with which
the motorist must contend. Notwith-
standing the manufacture Of motor
shoes has reached u stage of sattsfac-
ton which leaves little room for i'm
grovemcnt; the greater weight of the
1919 machines and their increased
power make tho difficulty more i'm
porlant than ever.
The average motorist of today does
not consider a tour over rocky and
rough roads particularly hazardous.
Etc throws his machine without fear
through n country which has been
considered impossible v to horse
aIMoun OF service from tires that he
would receive did he coniinc his driv-
:ng to city b~oulcvards.
The modern tire is Il marvel Of
workmanship. 1t is constructed to
Withstand Amos any amount Of ssrv-
ice. but no commodity is made that
can endure abuse. Neglect of u few
essential details will shorten the life
of any tire land extreme caution Is
necessary III observance of the little
rules which prevent tho shoes disin-
tcgrating ir 4 comparatively short
space of time.
Oil for Motor, Not Tires.
The motorist understands that he
may sustain the life of the motor n
other parts of the machine which re-
quirc fabrication by liberal applica-
ton OF oils. but the tire is so con-
slructcd that nothing in this nature
will prevent wear. Quite the con-
.trary. Application Of lubricants to
the surface of tires has IL distintegrat-
;-rr ocforx "a, t1,o r,,l,I,ov Oil gvroqS go
gasoline, or any of the other hydro
carbors is as bound to destroy a tire
II applied to it as Il cut with a knife.
The effect is not immediate, Of course.
but it is just as Inevitable. Immediate
results will not follow. No effect will
be noticed if the tires are wiped clean
after they have been placed in contact
with the lubricant. To allow a tire to
remain standing in a pool of oil or on
a greasy floor is counting trouble. the
same as a sharp piece Of glass invites
a p%uncture.
In these days, when oil and kindred
materials are used to surface roads. 1t
is especially necessary to watch the
tires. After a long tour over oiled
roads it is to be assumed that the tires
will be damaged. They will be unless
immediate and proper measures of
prevention are taken. The tires
should be wiped clean at the close OF
tho days run. If the oil is allowed
to remain on the treads ultimate and
fastened destruction is inevitable.
Beware of High Speed.
At high speed the wheels Of a motor
car slip on the surface of the road to
a degree scarcely reckoned with by the
average driver. Friction of the most
violent kind Notwithstanding, wear
ing, destructive friction. At a speed
OF thirty miles an hour this slipping
is slight but constant. When a mile
81 minute speed is attained the fric-
tion is increased out Of all proportion
to the increase in speed. At this speed
it is estimated a t%hirty-six inch wheel
will slip about six complete revolu-
lions during each mile Cor minute)
travelled. This will o to 81 total
slipping Of $500 Get every hour that
Il mile Il minute speed is maintained.
Therefore it will be readily realized
what n tremendous amount Of wear
is imposed or a tire when fast driv-
ing is INDUCED in. When the greatest
amount Of slipping takes place it is
hardly probable that the tires are
bearing the full weight Of the Car, as IL
is the continual bouncing at high
speeds which causes the wheels to
SuiH 4loIS AopiulS tldu IAe ROAD unuGr
them, but the Wear on the tires is
tremendous. The best evidence of this
kind Of friction is seen at the aver
age road race, when tires are chang
ed frequently in a run Of 100 miles.
Why Speed is Injurious.
A pneumatic tire is nothing more
than a collapsible air bag. The car
literally rides on air. 1t is the COM
pressibility Of the air which provides
the cushion effect when the wheels
strike an obstruction or inequality in
the surface of the road. The tire is
depressed at the point of contact with
the obstruction, and the area Of a
cross section of this portion is there
fore reduced. This naturally COM
presses the air in the tire, and the
soft" will make riding comfortable
shock. instead of being concentrated
in the point of contact, is distributed
throughout the entire interior of the
combining space. The compressed air
stores the energy impaired to it and
produces the rcsilicncy for which the
pneumatic tire is famous.
IL the air in the tire is already COM
pressed before tho shock is received
he additional compression or absorb
ton OF the shock will not be SO mark