Nike will enter the world of Motocross and Supercross this weekend when James Stewart and Ryan Dungey debut an all-new boot from the leading sports shoe company.

According to various reports on Racer X today, Stewart and Dungey will debut with Nike boots at this Saturday night’s Anaheim Supercross, the season opener for Monster Energy AMA Supercross, an FIM World Championship.

Both Stewart and Dungey have been supported by Nike for at least the past 12 months, although the news that the company had signed two of the leading factory stars for 2010 has come as a major shock just days out from round one of this year’s series.

It’s expected that the paur will debut with the new boot at Anaheim’s press day, set to be staged on Thursday at Angel Stadium where both defending champion Stewart and 450 class rookie Dungey will be in attendance.