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.
