never really necessary, the phsyics are basically the same). Wheel rotation is was refactored to be completely done in KartModel now.
Bullet is a 3D Collision Detection and Rigid Body Dynamics Library for games and animation. Free for commercial use, including Playstation 3, open source under the ZLib License. See the Bullet_User_Manual.pdf for more info and visit the Bullet Physics Forum at http://bulletphysics.org