Struggling to cope with rheumatoid arthritis, reigning Australian road race champion and three-time Olympian Jack Bobridge has been forced to retire from professional cycling at the age of 27.

In January, Bobridge produced a stunning effort in Buninyong near Ballarat by riding solo in the lead for more than 90 kilometres in searing 33-degree heat to win the national championship.

He also claimed two silver medals from three Olympics, three track world championship gold medals and broke the individual pursuit world record in 2011.

Diagnosed with rheumatoid arthritis in 2010, Bobridge was able to manage the chronic condition while still competing.

But racing and training took its toll on his body and after winning silver in the team pursuit at the Rio Olympics, then leaving professional team Trek-Segafredo in September, Bobridge conceded the time was right to step away.

"Since the [Rio] Games and backing off the training and racing load I've found my arthritis has been 100 per cent better," Bobridge told News Corp.

"And I've been able to get off all meds as well.

Bobridge (second from left) won two silver medals from three Olympics. ( Reuters: Eric Gaillard )

"I'm still on the bike three times a week but in terms of the arthritis it's been way less stressful on the joints and body."

In September, Bobridge had his confidential medical records published by cyber hackers the Fancy Bears.

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Bobridge was on a third list released by the hackers who stole the medical records from WADA's data storage system relating to Therapeutic Use Exemptions (TUEs) granted to athletes.

Bobridge was prescribed with prednisolone and glucocorticoids over a five-year period.

"Regarding the WADA hacks and 'leaks' of my personal information I'd like to make it clear I have no problem with this info becoming public," he said on Twitter at the time.

"It is widely known that I have rheumatoid arthritis that, at times has left me barely able to grip the handlebars.

"I have taken appropriate medication for this terrible disease according to the UCI rules with their written permission."

AAP