AP:
Organizers said [he] had registered another shoe that met race rules, but he switched to the shoes he had used in training to run the marathon.
...
the soles of his shoes were 1 centimeter thicker than the maximum 4 centimeters allowed.
The difference between the 2 shoes pic.twitter.com/seclMxK4qU
— Cuan Walker (@runwithcuan) September 12, 2021