PARALYMPIC champion Mark Colbourne admits that time has defeated him in his efforts to make it to Rio 2016.

The Tredegar para-cyclist, who won a gold medal and two silvers at London 2012, announced his retirement yesterday.

The 43-year-old, who once represented Wales at volleyball, broke his back in a paragliding accident in May 2009 and went on to become one of Britain’s top performers on the track and the road.

“My decision to retire was prompted by my age and by being honest with myself,” said Colbourne.

“I don’t feel I have the physical capabilities to continue for the next three years to Rio.

“I’ve really enjoyed my para-cycling career, the standout highlight being winning gold at the Paralympic Games in London 2012.

“I’m looking forward to being more involved with my Paralympic ambassador role for the London Velodrome – I’m very proud of that,” he added.

“I’m going to be setting up my own cycling training camp company which will help other people to learn and develop their cycling skills from grass-roots up to club level.

“I’m also going to continue with my professional speaking with the aim of sharing my story and helping other people to change and improve their lives.”