Germany’s Kerstin Meyer came second while Britain’s Sarah-Jane Nichols claimed bronze.
Rotorua’s Dion Newth finished in eighth place in the 50+ cruiser category after an unlucky crash in the final.
“Dion’s been a world [No] 1 rider before, and even though things didn’t go his way this time, his effort, heart and passion still shone through,” the club said.
“Together, they’re proving that age is no barrier when it comes to chasing your dreams.
“Whether it’s defending a world title or getting back up after a crash, Jeanette and Dion are a true inspiration to the Rotorua BMX Club and BMX community.”
Next year’s UCI BMX World Championships are in Brisbane in July.