;9 July 2025 –
Caen to Caen, riding the time trial in the polka-dot jersey of the
Mountains classification. The first of two
individual time trials on the 2025 Tour took place in
Caen in Normandy, over a route on wide, flat roads. There were three intermediate time checks on the course, located after , , and . The earliest benchmark time was set by
Pablo Castrillo (), who finished with a time of exactly 38 minutes, which was good enough for tenth on the day. His time was quickly bettered by his teammate,
Iván Romeo, who finished 16 seconds better than Castrillo.
Luke Plapp () seemed to threaten Romeo's time when he set the overall fastest time at the first two time checks but he eventually set a time of 37' 59", 15 seconds slower than Romeo. Eventually, a rider who sat in the hot seat for much of the day was
Edoardo Affini (), the current European time trial champion. Although he was not the fastest rider at the first two time checks, Affini sped up towards the end to set a time of 37' 15".
Bruno Armirail () came close to beating Affini's time but he eventually fell short by two seconds. The focus soon shifted to the battle between the contenders. After losing almost a minute in stage 4,
Florian Lipowitz () bounced back during the time trial, finishing with a time of 37' 40", which was good enough for sixth on the stage. His teammate,
Primož Roglič, finished just outside the top ten with a time of 38' 01". Other notable good times amongst contenders came from
Kévin Vauquelin () and
João Almeida (), who finished fifth and eighth, respectively. Soon, the top three contenders for the Tour,
Tadej Pogačar (),
Jonas Vingegaard (), and
Remco Evenepoel (), came down the start ramp. At the first time check, Evenepoel was a second faster than Pogačar, with Vingegaard already losing 20 seconds at the same point. Over the rest of the course, Evenepoel gradually increased his gap over Pogačar, who in turn was also extending his advantage over Vingegaard. At the finish, Evenepoel set the fastest time of 36' 42", winning the stage by 16 seconds ahead of Pogačar, who finished second on the day. Meanwhile, Vingegaard set a time of 38' 03", finishing outside the top ten and losing more than a minute to both Evenepoel and Pogačar. The yellow jersey holder,
Mathieu van der Poel (), set a time of 38' 26", conceding the yellow jersey to Pogačar, who now led by 42 seconds over Evenepoel. Vauquelin was third overall, the only other rider within a minute of Pogačar. Vingegaard now sits in fourth at 1' 13" down. Vingegaard's performance was considered sub-par, but he expressed optimism that he could recover the lost time in later stages. == Stage 6 ==