1972 Indianapolis 500

The 56th 500 Mile International Sweepstakes was held at the Indianapolis Motor Speedway in Speedway, Indiana, on Saturday, May 27, 1972. The race is notable in that for the first time, the cars were permitted bolt-on wings, and speeds climbed dramatically. Bobby Unser won the pole position at a then-remarkable speed of 195.940 mph (315.3 km/h) for four laps, breaking Peter Revson's track record of 178.696 mph (287.6 km/h) from 1971 by 17.244 mph (27.8 km/h) – the largest one-year track record increase in Indy history. The race average speed of 162.962 mph (262.3 km/h) was also a new record, which stood until 1984.

1972 Indianapolis 500

The 56th 500 Mile International Sweepstakes was held at the Indianapolis Motor Speedway in Speedway, Indiana, on Saturday, May 27, 1972. The race is notable in that for the first time, the cars were permitted bolt-on wings, and speeds climbed dramatically. Bobby Unser won the pole position at a then-remarkable speed of 195.940 mph (315.3 km/h) for four laps, breaking Peter Revson's track record of 178.696 mph (287.6 km/h) from 1971 by 17.244 mph (27.8 km/h) – the largest one-year track record increase in Indy history. The race average speed of 162.962 mph (262.3 km/h) was also a new record, which stood until 1984.