He was a member of British Cycling's Olympic Podium Programme, and represented Great Britain at a number of major events.

2007 saw Crampton take the silver medal in the keirin and bronze in the team sprint at the European Track Championships, this time riding in the under 23 category.

He won a bronze medal in the individual sprint at the first round of the 2008–2009 UCI Track Cycling World Cup Classics at Manchester on 1 November 2008.

He won silver in the men's team sprint at the 2009 UCI Track Cycling World Championships with teammates Jamie Staff and Jason Kenny.

He also won silver in the same event two years later with Chris Hoy and Jason Kenny, after the French squad were stripped of the world title and the British team were promoted from their original bronze medals.