An example using the grouped data

DE10Controller.cs

public float targetVelocity;    // target speed of rotation
public float torque;    // a torque to be applied to each wheel
public Wheel wheel;     // a group of setting related to wheels

// Start is called before the first frame update
void Start()
{
    foreach(Rigidbody rb in wheel.wheels)
    {
        rb.mass = wheel.wheelMass;
    }
}