"The government has proposed that riders should be able to use the Kent Street cycleway. Well,that's a bit like closing the Western Distributor to cars and telling the cars to use the Cahill Expressway. It's just not practical."
Mr Rice said cyclists held the protest"to show the government there are many,many riders who are concerned about safety issues".
The plan was previouslycriticised by Liberal MP Shayne Mallard who said cycling in the city would become more dangerous as a result.
"They are life-saving pieces of infrastructure for cyclists,"Mr Mallard said.
"We don't want cyclists riding on footpaths with pedestrians,pedestrians get very concerned about that."