As far as closely guarded digits go, the power data of top professional riders ranks up there with the Fort Knox door code or the King's phone number. So Cycling Weekly was as surprised as any when Remco Evenepoel revealed his functional threshold power (FTP) on his YouTube channel this week.
Surprised not only because such things are so often kept hush-hush; in addition to that, the figure was very much in the bracket marked 'jaw-slackening'. How about this: 425 watts.