Whilst Haruna is correct, I'll add a little more info. You can use the 'center spring' function to add some resistance to the wheel (on Linux this is done with 'ffset -a 30 -d /dev/input/eventX').
We'd really like to include force feeback (it's required to make SD 'the' racing game), however we're stuck with the choice of libraries. Currently we use a mix of plib and sdl1.2 to do joystick functions and these do not support force feedback. If sdl1.3 were ever release then we could use that...
If you have any suggestions or want to help work on it, there's a bug report for collecting information:
https://sourceforge.net/apps/trac/speed ... ticket/172Cheers,
Simon
(aka Mungewell)