The Colombian climber suffered a bent derailleur hanger with nine kilometres to go, and with the race at full speed the only option was for the Mavic neutral service mechanic to put Uran in the 11 sprocket.
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With his front derailleur still functional, Uran had a choice between a 53/11 and a 39/11 for the rest of the race, hardly ideal as you look to win your first Tour de France stage.
Understandably the Cannondale-Drapac rider was a little slow to get up to speed when Jakob Fuglsang (Astana) made an early move for the line with 450m to go.
But this long sprint perhaps helped Uran, as once he got on top of the large gear he was able to reel in Fuglsang and then Warren Barguil (Team Sunweb) eventually winning the stage in a tight photo finish.