BICYCLE WITH AERODYNAMIC UPPER HEAD TUBE

摘要

The present invention provides a bicycle comprising front and rear wheels and a frame including a main frame having a head tube and a top tube secured to the head tube at an intersection spaced from an upper end of the head tube. The intersection has a first lateral width, and the head tube above the intersection includes a tapered portion that tapers to a second lateral width narrower than the first lateral width. For example, the first lateral width can be at least three percent wider than the second lateral width. In one embodiment, the head tube above the tapered portion includes a flared portion that flares to a third lateral width wider (e.g., at least ten percent wider) than the second lateral width. In addition, the tapered portion can include a length that is larger (e.g., at least one hundred percent larger) than the second lateral width.

主权项

1. A bicycle comprising:
front and rear wheels; and a frame supported by the wheels, the frame including a main frame having a head tube and a top tube, wherein the top tube is secured to the head tube at an intersection spaced from an upper end of the head tube, the intersection having a first lateral width, and the head tube above the intersection including a tapered portion that tapers to a second lateral width narrower than the first lateral width.