Abstract: A bottom bracket assembly for a bicycle is comprised of a spindle and at least two cartridge bearings. The inner races of the cartridge bearings are axially fixed on the spindle by abutting stop elements. Crank arms attached to the ends of the spindle axially abut the outer stop elements, thus ensuring the precise and consistent axial location of the crank arms. Since the inner bearing races are fixed axially, the outer race of at least one cartridge bearing may be allowed to float in an axial direction to ensure proper alignment of the inner and outer races and the greatest possible bearing life for the bottom bracket.

Abstract: A fastener system for attaching bicycle chainrings to a bicycle crank comprised of a nut and a bolt. Both the nut and bolt consist of shafts with flanges on one end. The nut has threads formed on the interior of its shaft, while the bolt has threads formed on the exterior of its shaft. The nut and bolt can thus be threadedly engaged with each other to clamp the chainrings to the crank. Both the nut and bolt contain tool engagement interfaces formed on the interior of their respective shafts.

Abstract: A bicycle crank assembly comprised of a crank arm and a pedal connected to the crank arm. The crank arm has a pedal-connecting portion through which a transverse hole is located. Contained within the transverse hole is an insert, which is made from a harder material than that of the crank arm. The insert has an inner threaded bore and a support surface located at the front end of the threaded bore. A pedal is attached to the insert such that a threaded portion of the pedal is screwed into the threaded bore of the insert and a flange portion of the pedal abuts against the insert support surface.

Abstract: A bottom bracket assembly for a bicycle is comprised of a spindle and at least two cartridge bearings. The inner races of the cartridge bearings are axially fixed on the spindle by abutting stop elements. Crank arms attached to the ends of the spindle axially abut the outer stop elements, thus ensuring the precise and consistent axial location of the crank arms. Since the inner bearing races are fixed axially, the outer race of at least one cartridge bearing may be allowed to float in an axial direction to ensure proper alignment of the inner and outer races and the greatest possible bearing life for the bottom bracket.