Nitro Circus female stunt rider Jolene Van Vugt is going to attempt a double back flip on a BMX bike at the Wellington show.

People launching themselves into the air on bikes, skateboards and lounge furniture is a given.

But those who turn up to Wellington's Westpac Stadium tomorrow for Nitro Circus Live might also see something that's never been done before.

At some point during the mayhem, action sports star Jolene Van Vugt will attempt to be the first female to double back-flip a BMX bike off the show's 20-metre-high 'Gigant-A-Ramp'.

Nitro Circus Live Nitro Circus athletes attempting to learn the haka.

Canadian Van Vugt has already earned the nickname 'the craziest woman on the planet' after she became the first female to perform the trick on a regulation ramp and the first female to back-flip a dirt bike.

She was too focused on practicing the stunt this afternoon to speak with media.

But Nitro Circus ringleader Travis Pastrana – the 17-time X-Games medallist whose stunts have led to 36 operations – said Van Vugt was looking in good touch.

"We've got a lot of the top guys in the world [in the show] so when there's a girl that can hang with this crew, on and off the venue, it's pretty amazing."

Executing the trick will involve Van Vugt hitting 65kmh down the ramp before she is launched into the air. She will travel about 15 metres before coming to rest on two wheels, all going to plan.

"People see when you crash that it's very physical. But what you don't realise is the amount of G-forces that it takes," Pastrana said.

"She has to whip the bicycle so hard and basically tuck it in at the exact right time while she's under 15 G's [of pressure] on the takeoff, which is substantial.

"You have about two seconds in the air, so you get a flip a second, and you're kind of blind coming into the landing because you have a visor and everything."

This is the third time the Nitro Circus has been to New Zealand and it has come complete with 40 action sports athletes, including Kiwi freestyle motocross star Levi Sherwood.

The cast will be performing all sort of aerial stunts on BMX bikes, motorcross bikes, skateboards and anything else they can put wheels on.

"We have ten of the most durable people you've ever meet in your life and they're going to be going down [the ramp] in contraptions," Pastrana said.

"Like, literally, we strapped wheels to a couch. We aim and we let 'em go."

The Nitro Circus Live Wellington show begins at 6pm tomorrow. Afterwards it will move on to Hamilton, Auckland, Dunedin and Christchurch.