The 27-year-old attacked on the short but steep climb of the Côte de Mutigny, 16km from the finish, to finish 26 seconds ahead of the chasing peloton in Épernay.
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The S-Works Tarmac is one of three road bikes available to the Deceuninck-Quick-Step squad, along with the aero Venge and comfort-focussed Roubaix.
Alaphilippe, a punchy climber who has now registered three stage wins at the Tour, along with last year’s mountains jersey, opts for the low weight of the Tarmac, although Specialized claims the latest model is now as aerodynamic as the original Venge. Ideal for a breakaway artist.
Alaphilippe, the first Frenchman to wear the maillot jaune since 2014, rides a 52cm frame and runs a Shimano Dura-Ace Di2 drivetrain and hydraulic disc brakes, with the Japanese firm’s components subsidiary, PRO, providing the handlebar and stem.
Specialized provides the Romin Evo saddle and S-Works Turbo tubular tyres, wrapped to Roval CLX50 mid-depth wheels.
Take a closer look at Alaphilippe’s stage-winning bike in the gallery above — or check out our Tour de France hub for more from the 2019 race.