IndyCar Implements Safety Updates Following Indy 500 Crashes

IndyCar has completed its investigation into the cause of Kyle Kirkwood's Indy 500 crash, where the left-rear wheel assembly on his Andretti Autosport car broke free and sailed over the Turn 2 grandstands. The analysis revealed that the failure was due to a freakish failure of the retaining nut that holds the wheel hub and wheel bearings into the upright. In response, Dallara has designed a new, wider nut made from a different grade of steel to decrease the likelihood of it being stripped off the hub's threads. The new nut will be implemented starting this weekend at the Hy-Vee doubleheader at Iowa Speedway.