While the signing has been kept on the down-low, with no announcement from the team, Dibben's signing appears complete due to the fact he started stage one of the Tour of Utah on Monday.
Trainees are officially signed with teams as of August 1, but many raced with their teams in this weekend's races in San Sebastian and London.
Dibben has ridden on the road with Team Wiggins since its inception in 2015 alongside his track work. On the track the 22-year-old won the points race at the 2016 World Championships in London, also winning the event at the European Championships.
On the road he finished second in the U23 Tour of Flanders, as well as second overall in the Triptyque des Monts et Chateaux stage race. In 2012 he finished third at the Junior Paris-Roubaix and fifth in the junior race at the World Championships.
In April this year Dibben fractured his elbow in a crash at the ZLM-Roompot Toer and ultimately missed out on a place in the Great Britain team for the Olympic Games in Rio.
At the Tour of Utah this week, Dibben will be working for defending champion Joe Dombrowski.