Do I need to use a value on these for rFactor 2? For other race games you need to put them on 0% but I dont know for rfactor2 I have tried both on 0% and 100% but I notice no change I think..
Are you talking about the the settings in Windows Control Panel->Game Controllers->Properties? Or in rF2's controller.ini file? Either way, it depends on personal preference, but I usually run with the defaults in the former, and zero in the latter.