I made a table including every ITT ridden in a GT since 2000. There I calculated the gap (in %) between the winner and 2nd place, the winner and 2nd place and between the winner and the rest of the top-10.
Original results were used regardless of if someone got disqualified later.
Vingegaard's legendary time trial in 2023 sticks out like the sorest of thumbs in every category.
Biggest relative gaps to 2nd place
- 2023 Tour Stage 16, Jonas Vingegaard: 5,01%
- 2020 Giro Stage 21, Filippo Ganna: 3,09%
- 2002 Vuelta Stage 21, Aitor Gonzalez: 2,89%
- 2009 Vuelta Stage 1, Fabian Cancellara: 2,81%
- 2003 Tour Stage 12, Jan Ullrich: 2,73%
- 2004 Tour Stage 16, Lance Armstrong: 2,56%
- 2014 Tour Stage 20, Tony Martin: 2,49%
- 2003 Vuelta Stage 6, Isidro Nozal: 2,49%
- 2019 Giro Stage 1, Primoz Roglic: 2,45%
- 2007 Tour Prologue, Fabian Cancellara: 2,45%
Biggest relative gaps to 10th place
- 2023 Tour Stage 16, Jonas Vingegaard: 10,79%
- 2003 Tour Stage 12, Jan Ullrich: 8,54%
- 2004 Vuelta Stage 15, Santiago Perez: 7,15%
- 2004 Giro Prologue, Bradley McGee: 6,67%
- 2000 Tour Stage 19, Lance Armstrong: 6,56%
- 2024 Tour Stage 21, Tadej Pogacar: 6,46%
- 2014 Giro Stage 19, Nairo Quintana: 6,35%
- 2022 Giro Stage 21, Matteo Sobrero: 6,25%
- 2004 Tour Stage 16, Lance Armstrong: 6,17%
- 2007 Tour Prologue, Fabian Cancellara: 6,04%
And most strikingly...
Biggest relative gaps to the entire top-10
- 2023 Tour Stage 16, Jonas Vingegaard: 82,98%
- 2003 Tour Stage 12, Jan Ullrich: 51,37%
- 2004 Giro Prologue, Bradley McGee: 47,45%
- 2004 Vuelta Stage 15, Santiago Perez: 47,40%
- 2004 Tour Stage 16, Lance Armstrong: 46,07%
- 2024 Tour Stage 21, Tadej Pogacar: 45,30%
- 2022 Giro Stage 21, Matteo Sobrero: 45,01%
- 2007 Tour Prologue, Fabian Cancellara: 44,34%
- 2000 Tour Stage 19, Lance Armstrong: 44,32%
- 2009 Vuelta Stage 1, Fabian Cancellara: 44,06%
Closest races
- 2023 Giro Stage 9, Remco Evenepoel: 6,56%
- 2013 Giro Stage 8, Alex Dowsett: 6,58%
- 2010 Giro Stage 1, Bradley Wiggins: 8,09%
- 2025 Giro Stage 2, Joshua Tarling: 8,27%
- 2005 Vuelta Stage 20, Ruben Plaza: 8,83%