Al G. Barnes Circus
Posted By thecircusblog on July 19, 2012
Here you see a Mack truck pulling a loaded cargo trailer. There was no drive shaft in those trucks–they were chain driven. The chain ran from an exterior drive wheel to the back axle as seen here. there was no such thing as an inner tube in those days. The wheels then were hard rubber fastened by heat and stretched over the steel rim.
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