Patent ID: 7360470

Claim:
A bicycle crank arm comprising: a spine comprising an elongated, planar member having a crank boss and a spindle boss at opposed ends of the planar member protruding from an inner face thereof, the crank boss and the spindle boss integrally formed with the elongated member and each comprising a cylindrical element having a threaded portion on an outer face thereof adjacent a distal end thereof, a lumen extending through each of the crank boss and the spindle boss, and through the spine from the inner face through to an outer face thereof; an outer body comprising an elongated member having an inner face having an outer perimeter with a shape coincident with an outer perimeter of the spine planar member, the inner face recessed and dimensioned to admit at least a portion of the spine and having a crank boss aperture extending from the inner face through to an outer face at a first end dimensioned to admit the crank boss and a spindle boss aperture extending from the inner face through to the outer face at a second end opposed to the first end dimensioned to admit the spindle boss; wherein the crank boss and the spindle boss each have an axial dimension longer than a respective axial dimension of the crank boss aperture and the spindle boss aperture, permitting a portion of each of the crank boss and the spindle boss to protrude beyond the crank boss aperture and spindle boss aperture when assembled together; and attachment means linking the outer body and the spine comprising means for securing the crank boss and the spindle boss to the outer body using the protruding portions, the securing means comprising a crank nut and a spindle nut dimensioned for screwing onto the respective threaded portions.