The updated rear-wheel bearing retaining nut is being distributed to all IndyCar entrants from this weekend’s double-header oval event at Iowa Speedway, where its use will be mandatory. The strength of the part has increased by 60 percent over the previous design.
Revisions to the component came after a “meticulous review” of the Indy 500 incident, where the left-rear wheel assembly of Kirkwood’s Andretti Autosport detached from his car – after he clipped Felix Rosenqvist’s spinning Arrow McLaren car at high speed – and flew over the debris fencing.
Fortunately, it didn’t hit anyone, but the wheel did inflict serious damage to a road car that it landed upon in a lot positioned between the grandstands on the outside of Turn 3. Indianapolis Motor Speedway subsequently gifted the owner of the damaged car, Robin Matthews, a brand-new Chevrolet Equinox following the incident.
“Dallara continues to be a tremendous partner of the IndyCar Series,” said IndyCar president Jay Frye.
“Their thorough review process of the incident between the #6 and the #27 at Indianapolis Motor Speedway began immediately and included an extensive recreation at their headquarters in Italy.
“IndyCar takes safety very seriously. This update is an important step in making sure an incident like this does not happen again.”
Source: Autosport