A Brisbane cyclist has been left with a fractured ankle after a shocking clash with a pedestrian, which was captured on bike-mounted cameras.

Key points: James Stevenson says he was riding to work when he brushed past a man on a footpath

James Stevenson says he was riding to work when he brushed past a man on a footpath He says he kept riding but felt a punch from behind, before another pushed him off his bike

He says he kept riding but felt a punch from behind, before another pushed him off his bike The incident was captured on cameras installed on his bike and police are investigating

James Stevenson said he was riding to work in the Brisbane CBD on October 10 when he brushed past a man on the footpath on Hutton Lane.

"I moved over to the left as far left as possible so both of us could pass on our way," Mr Stevenson said.

"Unfortunately, he didn't seem to want to give me much room, so our shoulders touched.

"I didn't give it much thought and just carried on. Next thing I know is I feel a punch from behind.

"I turn around to see what's happened and another one has landed on me, pushing me over."

The incident was caught on camera, with the man heard saying "f***ing get off your bike" and "do you want to f***ing have a go?".

Mr Stevenson can be heard replying, "you're a big man walking away" telling the man "it's all on camera you w*****".

Mr Stevenson said he reported the incident to police, and hoped charges would be laid against the man.

"I really can't explain it. Some people just have anger management issues I think," Mr Stevenson said.

"This is my first incident of pedestrian rage I've ever encountered."

James Stevenson has a fractured ankle, and will have to wear a moon boot. ( ABC News: Mark Slade )

'A shocking and deeply disturbing attack'

Bicycle Queensland CEO Anne Savage said it was an unacceptable outburst.

"This is a shocking and deeply disturbing attack on a man who could not protect himself," Ms Savage said.

"He really easily could have been killed."

Mr Stevenson said he had a fractured ankle, and would have to wear a moon boot for several weeks.

"It had a bit of a knock-on effect … I've had time off work, my wife's had to take time off work to ferry me to and from hospital appointments," he said.

"It's also been quite difficult trying to explain to my kids how something like this can happen."

Riding on footpath is legal

It is not illegal to ride on the footpath in Queensland, unless signs state otherwise, but cyclists must give way to pedestrians and ride in a way that does not inconvenience or endanger others.

Mr Stevenson said he was riding on the footpath because Hutton Lane was a one-way street, and he needed to travel in the opposite direction to get to work.

"I was as far over left as I could be. There was 2 metres to his left," Mr Stevenson said.

"One sidestep, that's all he needed to take and we would have both got past."

A spokeswoman for the Queensland Police Service (QPS) said investigations were ongoing, but no-one had been arrested or charged.

She asked anyone with information about the incident to contact QPS.

Mr Stevenson said he provided police with vision of the incident, captured on front and rear cameras mounted on his bike.

"Increasingly we do see cyclists who have cameras on their bike for very good reason," he said.

"There are so many instances where we feel unsafe on our roads and that's an excellent way at least of arming yourself against unlawful behaviour and dangerous driving."