While newbies scratch their heads at that long title, those initiated to the sport of cycling will know that this DT Swiss 240s Rear Disc Hub is the hub they want if they're building up a new road bike with Shimano CenterLock rotors, a 142mm thru axle, and a Shimano or SRAM 11 speed drivetrain. Built on DT Swiss's proven 240 hub platform, they're supreme rollers, and we dig that they come in white, too. The 240s rear hubs use a forged aluminum shell that houses stainless steel bearings balls and races, which are known for their famous durability. And thanks to the DT Swiss labyrinth seal system non contacting seals that utilize an asymmetrical path to resist moisture, muck, and grit your bearings will keep their magical smoothness over the long haul. In addition to the way it sings on fast descents, the 240s' Star Ratchet freehub system is legendary for its simplicity, durability, and instant power transfer. The ratcheting freehub offers tool free access for routine cleaning and lubrication, and the freehub body is made of aluminum to maintain a lightweight package. Thanks to the fact that we now live in a world of 10 and 11 speed drivetrains, many of your hub and wheelset options have asymmetrical, highly dished rear wheels. This asymmetry doesn't allow adequate spoke tension on the non drive side of the wheel, causing unequal loads and an inherently weak wheel. DT Swiss concentrated on this problem when it developed the 240s Rear Hub. Its optimized flange geometry improves the wheel's symmetry, giving you tons of reliability and resistance to detensioning.