Semperit AG Holding is a manufacturer of industrial polymer and plastic products based in Vienna, Austria. From the middle 20th century, it produced bicycle tires for the Austrian road bicycle sold by Sears & Roebuck, including the classic white wall tires. Semperit is listed on the Vienna Stock Exchange, 50% of the company is owned by B&C Holding, with the rest being free float. History 1824 Johann Nepomuk Reithoffer receives the patent for waterproof fabrics 1949 Semperit begins manufacturing System Hans Hass swim fins designed by Hans Hass References External links Vienna Stock Exchange: Market Data Semperit AG Manufacturing companies based in Vienna Manufacturing companies established in 1824 Tire manufacturers of Austria Austrian brands Diving equipment manufacturers