https://www.techradar.com/news/tour-de-france-2018-why-this-years-race-will-be-the-smartest-yet

This weekend sees the start of the 105th Tour de France, with the world’s most famous cycling race starting in Noirmoutier-en-l'Île, before commencing a three-week tour of the nation before finishing on the Champs-Elysee - hopefully with Chris Froome in the yellow jersey.

But accompanying all the 176 riders in this year’s race will be sensors beneath each saddle, providing real-time data on speed and location to broadcasters, allowing fans around the world more insight into the world’s greatest race.