. 
Gaining 6,300 Miles 
by Proper Inflation 
L ONG before they had delivered the 
mileages everyone expects from 
Goodyears, two tires on a heavy eight- 
cylinder car blew out. The car-owner, 
Mr. Ralph Booth, took them to a Good¬ 
year Service Station near his office, on 
West 27th Street, New York. The 
Service Station Dealer examined them, 
asked Mr. Booth to what pressures they 
had been in flated, and then proved that 
according to the inflation charts the 
tires should have carried at least fifteen 
pounds more air. Mr. Booth wasn't quite 
convinced, but he put on two new Good- 
years and kept them properly inflated. 
These tires have already given 6,300 
MORE miles than the under-inflated 
ones and look good for as many more. 
Ask your Goodyear Service Station, or 
write to Akron, for Lesson 3 of the 
Goodyear Conservation Course—telling 
how to gain mileage by proper inflation. 
NDERINFLATION shortens 
by thousands of miles the life of 
the best of tires. 
Without proper air support the tire 
walls have to bend and flex sharply 
and constantly. 
The extreme bending and flexing of 
'side-walls without sufficient air-sup¬ 
port generates excessive heat at the 
flexing points. 
This heat acts on the rubber in and 
between the plies, making it lifeless 
and brittle. 
The plies separate on the shoulder of 
the tire, and from chafing against 
each other soon lose their strength. 
Then the inner plies, which are most 
quickly affected, are fractured—the 
tube is pinched between the rough 
edges of the break, and a blow-ou 1 : 
follows. 
0 0 0 
I N certain cases, however, where 
the damage is not too great and the 
weakened fabric carcass has not ac¬ 
tually broken, Goodyear Service Sta¬ 
tion Dealers find that by applying a 
Goodyear Reliner the tire can be made 
to deliver a thousand and more ad¬ 
ditional miles. 
But consistent attention to proper in¬ 
flation would save many thousands 
—at no expense whatever. 
Find out just what pressures your 
tires should carry by asking your 
Goodyear Service Station — or by 
sending to Akron—for Lesson 3 of 
the Goodyear Conservation Course. 
The Goodyear Tire & Rubber Co., Akron, O. 
A Tire With Fabric 
Fractures, Due to 
U n d e r-1 n fl a t i o n. 
Ask your Goodyear Service Station , or us, 
for Lesson 3 of the Goodyear Conservation 
Course — dealing with tire inflation 
Goodyear Reliner and Goodyear 
Patching Cement for Restoring Tires 
Weakened by Being Under-Inflated. 
