Lightweight cantilever bicycle frame

摘要

A bicycle frame, comprising at least two members, capable of improving upon at least several aspects of existing bicycle frames, including cost, weight, and reliability, while accommodating a wide range of rear tire widths. Various embodiments accomplish these improvements through the employment of structurally efficient cross sections, few supporting members, a cantilever rear wheel support, and few locations where members are adjoined and susceptible to certain failure modes.

主权项

1. A bicycle frame comprising:
a primary member including a first length of material with a forward end and a rearward end, a first bend, a second bend, a third bend, a cross section, and a rear hub supporting means at a point rearward of the second bend that supports a rear wheel assembly in a cantilever manner; and a secondary member including a second length of material with an upper end and a lower end, a secondary member aperture extending through the second length at a point proximal the upper end, operable to receive the primary member therethrough, and a drive feature supporting means proximal the lower end, whereby the secondary member is attached to the primary member and is operable to support a drive feature assembly between the drive feature supporting means and the rear hub supporting means, wherein the secondary member aperture reflects the cross section of the primary member.