South Australian road rule changes which allow cyclists of all ages to ride on footpaths will put people who are blind or vision impaired in danger, the Royal Society for the Blind (RSB) says.

Other rule changes require drivers to leave a one-metre gap when passing cyclists in a 60 kilometres per hour or under zone and leave 1.5 metres clear when the speed limit is greater than 60kph.

The changes come into effect from October 25.

Under current rules, only children under the age of 12 are allowed to ride on footpaths in South Australia.

RSB accessibility coordinator Tony Starkey said footpaths were the primary space of travel for people who were blind or vision impaired and they needed to be kept hazard free.

"Having a push bike roaring up behind you on a footpath or skimming around you or possibly catching you with a handle bar or something like that, we feel that could be quite dangerous for our clients," he said.

He said the organisation had expressed concerns about safety during the consultation period but had been ignored by the State Government.

"Whilst we have some sympathy with pushbike riders, we feel that footpaths are already crowded enough with obstacles and overhanging trees and rubbish bins and sorts of other items," he said.