race at Sebring (six hours rather than 12) on New Year's Eve in 1950.

Mass production

The Citroën DS was the first sustained mass production use of modern automotive disc brakes, in 1955. The car featured caliper-type front disc brakes among its many innovations. These discs were mounted inboard near the transmission and were powered by the vehicle's central hydraulic system. This model went on to sell 1.5 million units over 20 years with the same

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