National Geographic : 1957 Jun
The Detroit-Windsortunnel is one mile long-with 2200 feet of its length directly under the Detroit River. Firestone lets you "go below" with confidence! Through tunnels or over turnpikes, when you have to keep moving, the FIRESTONE NYLON SUPREME protects you from tire failure. There's peace of mind built into every Firestone Tire! When a river bed lies overhead, and rumbling traffic bounces hollow echoes off a tunnel wall, you ride with confidence on Firestone Nylon Supremes. You ride protected from dangerous tire emergencies because a built-in diaphragm in this tubeless tire stops sudden air loss in spite I of blowouts. A gum sealant closes simple punctures as quickly as they occur. The Firestone Nylon Supreme " tread is wider and deeper than ordinary treads. The extra-strength body is muscled with Safety-Tensioned Gum-Dipped" nylon and checked by nuclear controls. There's extra mileage and peace of mind built into every Firestone Nylon Supreme Tire. And trades are generous at your nearby Firestone Dealer or Store! ," FE~cli.'ive diaphrauqtn retai .s air even S iwhei a blowrout occurs. Iermaiietu seal BETTER RUBBER FROM START TO FINISH a1 at r s lops a ir los. from common picture. Copy right 1957, The irestone Tire & Iubber Co.