Abstract: A handle stem for a bicycle, having a body and a lid, which can be fixed to the body, the body and the lid forming together a handle bar receptacle for receiving the handle bar of the bicycle, has a clamping ring being formed separate from the body and being inserted into a ring receptacle of the body for receiving the forked shaft of a fork of the bicycle.

Abstract: A bicycle hub comprises an axle 5, a first part 7 being seated on the axle 5 and being provided with or connected to a cog 6, a second part 8 being movable relative to the first part 7 in longitudinal and rotational direction of the axle 5, the first part 7 and the second part 8 being in contact with each other via a screw coupling provided by threads 7? and 8?, a hub body 11 being arranged around at least the second part 8, the second part 8 being provided with a first cone surface 9, the hub body 11 having a second cone 10 surface formed thereon or connected thereto, wherein the two cone surfaces 9, 10 are engageable for power transmission, and wherein an adjustable stopper mechanism 12 is provided, limiting a gap providing space for an axial movement of the second part 8.

Abstract: A bicycle has a frame with a bottom bracket shell, with the bottom bracket shell holding a bottom bracket for bearing a crank shaft having crank arms carrying pedals, wherein the bottom bracket comprises at least one bush bearing.

Abstract: A handle stem for a bicycle, having a body and a lid, which can be fixed to the body, the body and the lid forming together a handle bar receptacle for receiving the handle bar of the bicycle, has a clamping ring being formed separate from the body and being inserted into a ring receptacle of the body for receiving the forked shaft of a fork of the bicycle.

Abstract: The present invention refers to a bicycle hub being part of the drive mechanism 1 of a BMX bicycle comprising: an axle 5, a first part 7 being seated on said axle 5 and being provided with or connected to a cog 6, a second part 8 being movable relative to said first part 7 in longitudinal and rotational direction of said axle 5, said first part 7 and said second part 8 being in contact with each other via a screw coupling provided by threads 7? and 8?, a hub body 11 being arranged around at least said second part 8, said second part 8 being provided with a first cone surface 9, said hub body 11 having a second cone 10 surface formed thereon or connected thereto, wherein said two cone surfaces 9, 10 are engageable for power transmission, wherein a cassette 6 with several sprockets 6a is connected to the first part 7.