 Bikes with a 'floating drivetrain' or 'floating bottom bracket' can use any type of suspension system to suspend the rear wheel from the frame, but use linkages to connect the crank assembly to the frame and rear suspension.Since the linkages are connected to the rear suspension, suspension movement causes the crank assembly to move as well.The floating drivetrain is often employed to compensate for the disadvantages of a particular rear suspension system so the design can make better use of its advantages.