Irvine quits after missing out on Rio
Martyn Irvine says failing to qualify for this year's Olympic Games is a "massive" factor in his decision to retire from competitive cycling.
Irvine became the first Irish cyclist to win a world track title in 117 years with victory in the scratch race in Belarus in 2013.
The Newtownards man reflected on the highs and lows of his track career.