Rubuta ci gaba ga wannan sakin layi - Mutuwar Roberts, da kuma mutuwar Eddie Sachs da Dave MacDonald a Indianapolis 500
, kwanaki shida bayan hadarin Roberts, ya haifar da karuwar bincike kan rigunan rigakafin wuta. Har ila yau, ya haifar da ci gaban Firestone RaceSafe fuel cell. Motocin tsere na zamani suna amfani da sel mai cike da kumfa don hana zubar da mai na girman motar Roberts. Hakanan, za a shigar da sutturar wuta mai cikakken wuta, wanda zai haifar da tilasta sutturar tsere ta Nomex. Roberts ya rasa abokinsa na kusa, Joe Weatherly, a watan Janairu 1964 a cikin Motor Trend 500, a Riverside, California.