The team's German domestique Christian Knees and cobbles specialist Luke Rowe shared pictures on Instagram of a select few Sky riders wet and muddy from a day of riding the cobbles, which will feature in the race on April 10.
To be fair, the weather on the first day of December could be similar to what it may be like in April, with the race having the reputation for challenging terrain and often horrendous weather.
While the organisers spend their time in the build up to the big race cleaning up all the cobbles, the Sky riders would have experienced the muddy, unadulterated pavé sections.
Sean Kelly shares his tips for riding on the cobbles
Knees's picture shows two of Sky's new signings getting a taste of the action, with Gianni Moscon at the front in the green and blue kit, with Danny Van Poppel behind him in his Trek Factory Racing attire, looking a little unhappy with the wintry conditions.
Sky's best finish in the Hell of the North Classic dates back to their first season in 2010, when Juan Antonio Flecha claimed third place behind Fabian Cancellara and Thor Hushovd.
Flecha finished fourth two years later, with Geraint Thomas's seventh place finish the best since then. Luke Rowe was the team's highest finisher in 2015, crossing the line in eighth place.
More medals for Britain at Track World Championships but Italy steal the show
It was medals galore on day two of the Track World Championships in Roubaix with Italy taking the lion's share
By Tim Bonville-Ginn •
DT Swiss rejoins the Pro Tour with Lotto Soudal
Wheel giants partner with Belgian outfit for the 2022 season
By Luke Friend •