Bardet and Peraud, followed by Nibali and his team-mate Jakob Fuglsang, went ahead.
CHRIS Froome conceded four seconds to Romain
Bardet on the Col d'Izoard, but took another step towards his fourth Tour de France title as Warren Barguil won stage 18.
The Italian national champion now leads the Tour by six seconds from Froome, Frenchman
Bardet closing to within 25 seconds of yellow in third place.
CHRIS FROOME crashed but saw his overall lead grow as Romain
Bardet won a damp, treacherous stage 19 of the Tour de France to Saint-Gervais Mont Blanc.
But at the summit, only Nairo Quintana was able to grab a handful of seconds on Froome who crossed the line ninth, 36 seconds behind
Bardet.
In the overall standings Froome finished in a time of 29 hours 59 minutes and 31 seconds to give him the win by 12 seconds from
Bardet with Martin a further seven seconds back, just two seconds in front of Porte.
Bagneres De Luchon: Frenchman Romain
Bardet and American Tejay van Garderen's Tour de France podium hopes suffered a major blow yesterday when they lost considerable ground in the 16th stage won by Australian Michael Rogers.
TOUR DE FRANCE CHRIS FROOME was booed in Yellow Jersey rival Romain
Bardet's back yard - but produced a stunning fightback to preserve his lead on the Tour de France.
BMC's Australian Richie Porte was pipped to third - and the final bonus seconds on the day - by Froome, while France's great hope for a home win, Romain
Bardet, came in fifth, just ahead of Britain's Simon Yates.
Froome finished Thursday's 186.5-kilometres stage from Gap to Saint-Jean-de-Maurienne in 12th place, 3mins 02secs behind stage winner Romain
Bardet (Ag2r La Mondiale).