The Schwinn S-7 tire was introduced when Schwinn created the Middleweight bicycle class in 1954/1955. A construction embodying all the latest advancements in the tire art." Schwinn S-7 tires 1954-1970s A 2 1/8" automobile tire type double tube, straight-side, cord tire on a new deep drop center rim. The only major development since the coaster brake. Schwinn introduced the balloon tire in the spring of 1933 and two years later it was pretty much used on all bicycles made in America.įrom a 1933 advertisement: "Low pressure 18 to 22 lbs. The new "balloon" tires were wider and had an inner tube, which naturally became the standard of bicycle tires to this day. Scwhinn went to Europe to research bicycles there. Schwinn Balloon tires 1933-1955īalloon tires (wide, durable tires with innertubes) were introduced to America after Mr. Schwinn part number in red, manufacturer part number (in black).
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