SavinglTe-Mo 



Thirty cents out of every dollar 

 spent for tires is thrown away. 

 Why? Because automobile users 

 do not take care of their tires 



AT the end of 1916 about three and 

 one-half million pleasure automobiles 

 ' were in use on the roads of the 

 United States. During the year the owners 

 of these vehicles spent about one hundred 

 dollars each for tire maintenance. It 

 follows that the stupendous sum of three 

 hundred and fifty million dollars is an- 

 nually spent on the tires of the pleasure 

 cars alone. But much of it is squandered. 

 Ignorance and carelessness are responsible 

 for much waste. Mileage is literally built 

 into a tire. It is the driver's task to obtain 

 that mileage. The manufacturer has pro- 

 vided for everything except human 

 fallibility^ That is why thirty 

 per cent of the money annu- 

 ally spent on tires, in other 

 words, about one hundred 

 and five million dollars — 

 money enough to interest 

 even Rockefeller or Car- 

 negie — is thrown away. 

 Much of that princely sum, 

 enough to build half a dozen 



uperdreadnoughts, could be 

 oaved by the judicious use of 

 mere air, something that costs 

 nothing. Under-inflation 

 is the cause of far too much 



tire trouble. Klondike gold 

 miners, enriched overnight, have been 

 known to light cigars with hundred dollar 

 bills and are regarded as horrible examples 



f reckless prodigality. But what shall be 



aid of the sensible business man who throws 



ubber 



Structure of 

 a Tire 



1. I lies uf Sea IsUnJ fabric 



2. Extra coatins of finest 

 between fabric layers 



3. yi inch pure I'ara rubber 

 cushion layer 



4. 3-32 inch breaker strip of Sea 

 Island fabric and high erade 

 mbbcr 



H inch tread, tough, resili- 

 ent. KTipping 



H inch side wall of 



stroajfest rubliei 



. Bead, buik 



into tire for 



clincher 



By Waldemar Kaemptfert 



away thirty cents out of every dollar that 

 he spends on tires? 



Air Is the Secret of a Tire's Buoyancy 



It is not the rubber, not the fabric of a 

 tire that gives it remarkable cushioning 

 properties. It is air — just air. If you 

 doubt this, consider the old-fashioned, iron- 

 tired, wooden buggy-wheel on the road. 

 What happens when it strikes a small stone 

 in the road? It rises over the stone, you 

 say. True. But the horse had to lift the 

 entire load, didn't he? Whenever anything 

 is lifted, work must be performed. Clearly, 

 the horse was wasting power. 



What happens when an air- 

 tube strikes a small stone ? 

 It is simply forced into the 

 tire momentarily; the air in 

 the tube has been com- 

 pressed, or rather displaced 

 at point of contact; the 

 wheel did not have to be 

 lifted. Do you understand 

 now that the pneumatic 

 tire owes its cushioning effect 

 to air alone? Rubber is 

 utilized simply because it is the 

 only substance known that is 

 elastic, air-proof and water- 

 proof. 



Measure the Load on the Tires 



To save tire money you must understand 

 that there is a very definite relation between 

 the air-pressure within the tire and the 



^(Yr 



