Bookwalter went closest, finishing four seconds behind the 23 year old, who revealed that a training camp alongside Tao Geoghegan Hart ahead of the race aided his performance.
He added: “After the Tour de Yorkshire me and Tao flew straight to Park City, which is at 2,000 metres, and we were there for nine days. We didn’t got there with this TT in mind, it was more just to get an altitude camp and a good block of training in ahead of the race, but it would definitely have helped today.
“We were all discussing this morning how we thought it was going to go, what difference being at altitude [2,000m] would make, but no one really knew.
"My plan was just to set off, ride purely on feel, and get into it. After five or six minutes the pain was there, I was starting to suffer, but I wanted to keep that intensity to the finish… And I did!”
Asked if he expected to pick up his pro win in his first year with Team Sky, Dibben interjected, laughing: “No! At the start of the year I didn’t have any specific goals. Just to turn up at races and do my job, hitting performance targets. Along the way I guess I’ve highlighted days like today and thought, ‘OK, that could suit me,’ but to win…
"Beforehand I was speaking to Tao and I didn’t really know what to expect. I guess I’d have been happy with a top 20 so to win is pretty damn good!"