Abstract: A bicycle crank may include a first lug, a second lug and a transition region. The first lug is for connecting a spindle. The second lug is for connecting a pedal. The transition region interconnects the first lug and the second lug, and is formed from a fiber reinforced thermoplastic material that includes a fiber component and a thermoplastic component.

Abstract: A rear derailleur is configured as a hierarchical, at least two-level modular construction system and comprises at least several of the modules: “base element module”, “swivel formation module”, “shifting element module”, and “chain guiding device module”. At least one of the modules is replaceable and handleable in one piece. At least one of the modules includes at least one sub-assembly that is replaceable and handleable in one piece. In an embodiment the modular construction system is configured to use at least one family of sub-assemblies comprising at least two family members within at least one of the modules.

Abstract: A twist-grip shift mechanism that includes a housing part, a rotating part and a ring disposed in the rotating part. The housing part includes a cylindrical extension and a housing extension. The rotating part is rotatably mounted on the cylindrical extension. The cylindrical extension has tongues with retaining profiles extending from one end of the cylindrical extension for releaseably connecting to the ring. The tongues and the retaining profiles do not extend beyond an outer diameter of the cylindrical extension so that the housing part may be formed by an injection molding process using a single half of an injection mold, thereby eliminating undercuts and other molding inaccuracies.