Challenger Racing Karts 1960 Long Sleeve T-Shirt

Simplex Manufacturing Corporation was an American manufacturer that made motorcycles and other small engine vehicles from 1935 to 1975. Simplex's minimalist philosophy was maintained throughout the company's history, whose designs changed little after 1935. By the 1950s, Simplex's designs were considered primitive, leading to the end of their motorcycle models. However, they continued to make minibikes and karts, including their highly competitive Challenger series, using their proprietary engines until 1975, when they went out of business.