On New Year's Eve 1950, a Crosley HotShot with four-wheel disc brakes won the Index of Performance at Sebring. The Crosley's superior braking drew attention, but the manufacturer soon went back to drums because of reliability issues. So it was really the success of the Jaguar C-Type at the 24 Hours of Le Mans in 1953 that focused the racing world's attention on this superior braking technology. Even so, many rivals were slow to make the switch and Daimler-Benz seemed to have a viable if pricey alternative with its air brake on the 1955 SLR. Whatever happened to that idea? It is surprising to me that it took until well into the 1950s before racers really began to appreciate the critical important of braking to lap times. I wonder why this was the case?