Nitro Circus athlete manager Ricky Melnik said Mildon approached him in Europe on their recently completed tour with the idea of having the winner of the latest event getting a chance to ride on the Nitro Circus Tour.
"New Zealand has such a rich history of action sports talent, especially in BMX, with Jed Mildon being at the very forefront of that talent pool. He is so passionate about his country and his sport, how could we not agree to this?
"Jed's best character trait by far is his willingness to help others be the best versions of themselves. Not just in BMX but in all aspects of life.
"He's a great ambassador for Nitro Circus, the sport of BMX and New Zealand. We are extremely excited to see Jon put to the test on the 55 foot Nitro Gigantaramp when we arrive in New Zealand in March."
Riddle will audition in Auckland in March for a spot in the 2019 tour of New Zealand.
The five-stadium tour comes to Auckland's Eden Park on March 9, Hamilton's FMG Stadium on March 10, Wellington's Westpac stadium on March 15, Napier's Mclean Park on March 17 and AMI Stadium in Christchurch on March 23.
Tickets are still available from www.nitrocircuslive.com or Eventfinda.