Ronald Barth Duman (February 12, 1929 – June 9, 1968),[1] was an American racing driver who competed in the USAC Championship Car series and the Indianapolis 500.

Duman was an accomplished driver in sprints and midgets,[2] and won the prestigious Little 500 at Anderson Speedway in 1959 and 1960.

Duman was fatally injured in a crash at the 1968 Rex Mays Classic at the Milwaukee Mile.

After passing his rookie test in 1961,[3] Duman made an attempt to qualify with the Ray Brady Special but the run was incomplete.

[7] Driving a sponsor-less pink and black Trevis-built Watson/Offy entered by Nick Fulbright and Dave Paul.

The accident happened in front of Duman, and as he approached the crash scene, he attempted to miss both Sachs and MacDonald.

Less than two weeks after he finished 6th at the 1968 Indianapolis 500, Duman was at the next race of the USAC Championship season, the Rex Mays Classic at Milwaukee.

Duman started 14th in the 24-car field, driving the Central Excavating Gerhardt Turbocharged Offy.