My Logitech is my spare wheel now but when I run it the settings are like this:
Logitech Driver:
Overall Effects Strength 100%
Spring 0%
Damper 0%
Enable Centering Spring (checked)
Centering Spring Strength 0%
Degrees of Rotation 300-700 (depends on mod, I use Profiler to load each mod with the best rotation)
Allow Game To Adjust Settings (checked)
rFactor Setting Pages:
Force Feedback Strength -78% (Have to reverse the RealFeel in most mods)
Force Feedback Type: Wheel
Force Feedback Effects: Low (anything higher introduces canned effects)
Digital Steering Rate 50% (doesn't affect wheel/pedals)
Digital Throttle Rate 50% (doesn't affect whee/pedals)
Digital Brake Rate 50% (doesn't affect wheel/pedals)
Digital Clutch Rate 50% (doesn't affect wheel/pedals)
Speed Sensitivity 0%-25% (depends on mod)
Look Ahead 0%
Head Movement 0%
Exaggerated Yaw 0%
ALL CONTROLLER SENSITIVITIES ~75% on steering, ~90% on accel and brake (I have a hydraulic brake so you may prefer 50%)