At 300 miles, Roberts made his one and only pit stop for fuel and a single tire change, and gave up the lead to Snyder.
At 375 miles, Snyder made his 3rd stop for more methanol, and Roberts re-took a lead he would not relinquish to the checkered.
[6] The race was run under heavily overcast skies, with rain threatening the entire day.
On lap 45 the number 42 car driven by Emil Andres hit the wall in turn two, then flipped over several times, causing its right front wheel to fly off.
The wheel traveled 100 feet (30 m) through the air and hit Spence, who was pronounced dead upon arriving at the hospital.