The Shweeb, the world's first human-powered monorail rac' />

First it was bungy jumping, then swooping and zorbing.

Now there's shweebing.

The Shweeb, the world's first human-powered monorail racetrack, has been unveiled at Rotorua's Agroventures.

Single riders can reach speeds of 60km/h and multi-rider teams can exceed 70km/h.

It has two 200m overhead rails circuits from which high-performance pedal-powered vehicles hang.

Riders lie back in a seat and pedal their way round the track.

The Shweeb has several gears. The ride can be leisurely or competitive, with the tracks set up to allow racing against other "schweebers".

Up to five carriages can be loaded on to each track.

Inventor Geoff Barnett developed his idea in Rotorua due to the large number of tourists visiting the city looking for new adventures. He moved to Rotorua from Australia six months ago with his wife Manami and 3-year-old son Kenta.

He thought of the idea while teaching English in Tokyo and has been working on the prototype for six years.

Mr Barnett was also influenced by his cycling passion.

He cycles everywhere and has never owned a car.

So is the Shweeb just like riding a bike?

Mr Barnett reckons it's better.

"It's an all weather bicycle, it's a no hands bicycle and it's a comfortable bicycle just like sitting on a sofa."

Shweeb is taken from the German phrase schwebe bahn which means hanging railway.

Mr Barnett's business partner is longtime friend and Auckland developer Andrew Kolovos.

Mr Kolovos has travelled to Rotorua to help fine-tune the Shweeb.

He admits when Mr Barnett first approached him with the idea, he thought he was crazy.

"It sounded really off the wall, just something I never imagined.

"The more I learned about it the more enthusiastic I got."

The pair has spent almost $500,000 so far on the adventure product.

Two prototypes were tested last week by several media, including the Daily Post.

It was an unusual feeling being under a track - like being on a human-powered rollercoaster.

The biggest difference between Mr Barnett's invention and other adventure activities is that the Shweeb involves a lot more physical action by the rider.

Mr Barnett said more work needed to be done on the prototype.

It was hoped the track would open in July.

He hopes to get the New Zealand cycling team to race against the New Zealand mountainbiking team as part of the official opening.

"Then we will find out who the top guns really are."