Direct-drive sim racing wheel

A direct-drive simulator steering wheelbase (sometimes abbreviated "DD wheel") is a simulator steering wheel with a direct-drive mechanism between the drive and output, i.e. without gearing (as opposed to simulator steering wheels with reduction gearing via gears or belts), and is used similarly as with other simulator steering wheels for providing torque feedback (often called ""force" feedback", or FFB) so that the driver, through movement in the steering wheel, gets an interface for sensing what is happening to the car in the simulator.

Source: Wikipedia — Direct-drive sim racing wheel (CC BY-SA 4.0)