Patent ID: 7998032

Claim:
A bicycle trainer frame adapted for use with a bicycle, the bicycle trainer frame comprising: a base; a frame having spaced apart ends adapted to engage and support the bicycle in a generally upright position with a wheel of the bicycle disposed between the ends, the frame being generally a hyperboloid having a central portion located between each of the ends; and a pivoting assembly joining the frame to the base at the central portion of the frame, the pivoting assembly having a single pivot, the pivoting assembly being the only support of the frame on the base, and allowing movement between the frame and the base such that the frame is allowed to tilt from side to side, the pivoting assembly including a torsion element having a first end non-rotatably coupled to the frame and a second end non-rotatably coupled to the base, and having an axis wherein the first end twists about the axis relative to the second end when the frame tilts from side to side, the torsion element resisting tilting of the frame relative to the base.