This period starts from the date of manufacture which is printed on the rim.
To claim about a wheel under warranty Alcoa® Wheels has its own service where you must contact the Alcoa® Wheels Fleet Service through the manufacturer's official website.
Arconic's Fleet Service Center is an initiative of Alcoa® Wheels Products Europe aimed at fleets and owner operators. The center offers a direct service and assistance to fleets with technical and after-sales support.