If I, with my G25, come to a halt and turn my wheel full lock the wheels ingame turn with every degrees, so it uses the full 900 degrees. In really slow and sharp turns you have to grab the wheel a step further to steer sharper. So in my point of view it works all 900 degrees. Or did you want less? Then no you cant change it.
Xbox GT: TTR 683 - PSN ID: TTR-666 Site: http://ttr.toshiba-3.com/