Do you have stutter on certain tracks, at the same point on the track? It's probably because Race 07 hasn't recognised your system specs, and given the game it's own settings. Goto, \Documents\SimBin\RACE 07 Open up the Config.ini file with notepad, look for the following lines.. CPURATING= SYSTEMRAM= VIDEORAM= OBJDETAIL= TEXDETAIL= Update them with your system details. Mine originally said.. CPURATING=1 SYSTEMRAM=-1 VIDEORAM=-1438 OBJDETAIL=2 TEXDETAIL=1 I changed them to.. CPURATING=1 SYSTEMRAM=4096 (I have 4gb RAM) VIDEORAM=896 (my gpu RAM is 896mb) OBJDETAIL=3 TEXDETAIL=3 Stutter fixed for me. If that doesn't solve it, try disabling replays as well. Credit to Andy Graydon for the fix.