Normally the time trial bikes aren't even on the road yet, especially not at the start of a stage, because the time trial in this Tour doesn't take place until the last week. Perhaps Hindley wants to use the rest day today to train?
The Shiv TT was only outside for a short time, the wheels were still in their bags. However, the handlebars caught our eye: Hindley uses a custom-made carbon construction as a trailer, mounted on the basic handlebars of the Specialized.
Thomas Pidcock (Ineos Grenadiers) is also likely to use the race-free day at the Tour of France to do a training lap on his Pinarello Bolide F. At least the mechanics prepared the Brit's time trial bike in the team truck at the end of the seventh stage.