Sim Racing
Force feedback (FFB)
Motor-driven resistance a wheelbase sends back through the wheel so you feel the car through your hands.
The motor-driven resistance and detail a wheelbase sends back through the wheel — the forces that let you feel kerbs, grip loss and weight transfer through the rim. Peak strength is quoted in newton-metres (Nm), but the headline number isn't the whole story: how cleanly and quickly the base reproduces small details often matters as much as raw torque, and most drivers run well below the maximum.
Concrete example
a 8 Nm base set to a comfortable strength can feel more informative than a 15 Nm base cranked to a level you have to fight.
What it means when you're buying
treat peak Nm as a ceiling, then judge bases on smoothness, fidelity and software tuning rather than the spec sheet alone.