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In page Disc brake:

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The American Crosley Hot Shot had four-wheel disc brakes in 1949 and 1950. However, these quickly proved troublesome and were removed.[1] Crosley returned to drum brakes, and drum brake conversions for Hot Shots were popular.[9] Lack of sufficient research caused reliability problems, such as sticking and corrosion, especially in regions using salt on winter roads.[9] Crosley four-wheel disc brakes made the cars, and Crosley-based specials, popular in SCCA H-Production and H-modified racing in the 1950s.[citation needed] The Crosley disc was a Goodyear-Hawley design, a modern caliper "spot" type with a modern disc, derived from a design from aircraft applications.[1]