Patent ID: 7918471
Filing Date: 2011-04-05
Classification: B62K

Abstract:
1. A bicycle frame comprising: (a) a front quadrilateral of tubular elements, the front quadrilateral having (b) a rear triangle of tubular elements, the rear triangle having (c) a coupling element joined to the other end of the horizontal upper tube and to other end of the upper brace to form a joint between the horizontal upper tube and the upper brace, an axis of the joint between the coupling element and the upper brace approximately coplanar with an axis of the upper brace; (d) a seat tube projecting outward from the joint between the coupling element and the upper tube, the seat tube having an axis which intersects the center of the pedal attachment point; (e) a comfort angle between an axis of the horizontal upper tube and the axis of the upper brace is greater than or equal to 120; and (f) the frame is a single piece manufactured of carbon-compound material.