The 160 kilometre stage from Bourg-en-Bresse to Culoz saw just a handful of half-hearted attacks against the yellow jersey and Team Sky were able to cover them to keep Froome almost two minutes clear overall.
Colombian Pantano of IAM Cycling collected his first career Grand Tour stage win by outsprinting Tinkoff’s Rafal Majka as the last two survivors of a 30-man breakaway scrapped over honours on the day, but behind there was little action in the general classification fight as another opportunity for Froome’s rivals passed by.
“I’m surprised there weren’t more attacks today because it was a perfect opportunity to really put us under pressure,” Froome said.
“I did expect more to be happening but it was such a hard day not many people had the legs there.”
Froome crossed safely in a much-reduced peloton a little over three minutes after Pantano, and the Team Sky man remains one minute 47 seconds clear of Trek-Segafredo’s Bauke Mollema in second, with Briton Adam Yates of Orica-BikeExchange still third, two minutes 45 seconds down and leading the young riders’ classification.
After the riders tackled the hors categories Grand Colombier, they crossed the finish line for a first time in Culoz and doubled back to go up the other side of the mountain and it was there, on the Lacets, that a handful of contenders tried their luck.
Astana’s Fabio Aru was the first, followed by Quintana’s team-mate Alejandro Valverde, and then AG2R La Mondiale’s Romain Bardet.
But each time Froome’s Sky team-mates just increased the pace at the front of the peloton and methodically reeled them back in without Froome having to do the work.
“I really am in such a privileged position to have such a strong team around me,” Froome said. “It may be the strongest team Sky has ever put in the Tour de France and these are guys who would be leaders in other teams in their own right.
“It must be quite demoralising for other people to have to think of attacking knowing this calibre of riders will be chasing them down.”