The Seattle star. [volume] (Seattle, Wash.) 1899-1947, 1921-07-23

Eighty par cont Of the materials
that 30 into q high grade pneumatic
tire are Of q vegetable nature ana
consequently pcrishabla.- says an
article on tires issued by the u. q.
Rubber Co.
The rapidity Of perkhablsness
dcpcnds to . considerable degree on
tho extent Of Unnecessary exposure
OF the tire To dcteriorating combina.
tons Of moisture, light and heat m
well N avoidAble destructive abuses
such a. cutA abrAsions and rup-
turea." II continued
-stcei tires are practically I'm
mune from human abusa but rub
Der tires are not and their careless
destruction becomes . worldwide
economic ioxu with an annual tire
bill Of considerably moro than
u 900. 600. 900.
by proper carr tan per cent a.
diuouAi tire mileage could be oh
tanned which. translated. means a
yearly upkeep saving Of over $780,.
opo, ooa.
"A majority q pneumatic tire
failures take the form Of = puncturc
or . blowout Wen constructed tires
Of proper sixs for the car do not
puncture easily or frequently.
-Biowouts on the other hand may
be traocabls 10 . long list OF causes.
A blowout may affect only the tube.
Mor~ often Il involves both tube and
casing.
Reasonable Insurance asainsi
tubs pinchinK and resulting leak or
blowout IL 20 exercise intelligence
In selecting the proper sixe tube and
flap for the casing. keeping the rim
In good condition and using care IN
the ASSEMBLY and mounting Of thcse
units.
Ordinary biowouts that asfccf
both casing and tube srv the result
OF . weakening In the fabric OF the
tire carcasa II Ia the blowout 70
suiung from tire abuse that IL cost.
~ and that must be avoided II the
tire Ia TO render It's fun service.
The most fragrant tire abusen.
resulting In premature biowouts IN
onsings. arc: Overload. undermine.
ton. overspeedine. miSaiiEnment Of
whsein. driving In car tracks and
rutA neglected cuts and improper
use Of ansisksd devicea
AN tires have = load lmis- The
maximum actual tire load should
not exceed the maximum load
carrying capacity Advertised By re
sponsibis tire manufacturers.
Proper imitation In ~ important
M prcper loads. Tires are not built
10 take the place OF steei springs or
OF shock absorbcra Under Initiation
results IN an unnatural fiexing OF
the layers Of fabric which causes
early destruction OF the tire carrass
DO not change imitation pres
sur~s with changes In atmospheric
tsmpsrAturA Avoid running on .
fiat ura
-Iieat excrt, . dsterioraung Il.
feet Most damage u produced At
high running spced By the internal
friction Of the tire cArAaa From
the standpoint Of Tire life. mechanI-
cal upkeep ana gasoline economy.
car speeds should b kept within
pf&1cftueo um1SA
Among the factors which hav~
an intimate relation TO tire mileage
u wheel alignment when the two
opposite wheels are mot parallel
there h . diagonal grind At the
point where the tires come In con-
tact with the road surface which
wears Off the rubber almost ~ fast
~ n In contact with An emery
wheel
"Beause q . tendency u the
front wheels 10 spread during driv.
Ing car manufacturers set them AZ
foe-tn from thrcecighths 20 ono
half an inch and when thus adjust.
ed the wheels are properly aligned.
Rough pavements and crossings
tempt the u,otorfst TO drive on street
car tracks, The strain on certain
parts Of the tire viii wear a dcpres-