A bicycle frame structure has a drop-out and includes: a fixing bracket having a rail groove formed in a frontward and rearward direction and fixed to one side of the frame; a movement member mounted to the fixing bracket to be movable forward and backward along the rail groove; a drop plate fixed to the movement member and having a drop-out formed therein for fixing a wheel; and an adjustment bolt screw-engaged by penetrating one side of the movement member. A front end of the adjustment bolt is supported by a fixing support formed in the fixing bracket. The movement member is moved along the rail groove according to rotation of the adjustment bolt.

The present disclosure provides a hub unit including a fixing shaft disposed along a rotation center shaft; a hub body rotatably disposed at the fixing shaft through a bearing and having space inside; a brake disk fixed in the hub body by a bracket and formed in a circumference direction on a basis of the fixing shaft; a fixing member where one side of which is fixed to the fixing shaft; a caliper formed at the other side of the fixing member and a part of the brake disk is inserted into the caliper; and a brake pad where both inside surfaces of the brake pad are contacted with both side surfaces of the brake disk.

A hub with disengaging effect of ratchet faces in an idle mode includes: a gear barrel with first and second housing parts is located at the spacing from the driven end of the hub; a ratchet disc fixed in the driven end has a first annular ratchet face corresponding to the gear barrel; a double-sided free toothed disc disposed in the first housing part is in synchronous rotation with the gear barrel, and includes a second annular ratchet face, which is in a single steering engagement drive relationship with the first annular ratchet face; an elastic expansion member is disposed between the ratchet and double-sided free toothed discs, to push off annular ratchet faces in idle mode; a repulsion disc is mounted in the second housing part at the circumferential direction; an axial repulsion member has repulsion parts which are respectively disposed in the double-sided free toothed and repulsion discs.

An axle assembly, including: an axle sleeve with first and second end faces, an opening, and a first engagement surface; a control shaft with an engagement end, a control end, and a second engagement surface. The control shaft overlaps the opening and is axially displaceable in extending and retracting directions. The control shaft is rotatable relative to the axle sleeve between: (i) a first orientation where the control shaft is retained to the axle sleeve by an overlie engagement between the first and second engagement surfaces to restrict the axial displacement of the control shaft in the retracting direction at a first axial position; and (ii) a second orientation circumferentially offset from the first orientation such that the first and second engagement surfaces are not overlying and the control shaft may be axially displaced in the retracting direction relative to the first axial position.

A clamping mechanism for mounting and demounting bicycle components of at least partially muscle-powered two-wheeled vehicles such as bicycles, including at least one operating lever and a clamping component. The clamping mechanism includes two clamping parts, one of which clamping parts is a clamping sleeve and connected with the operating lever, and another of which clamping parts is formed at the clamping component. The operating lever can be moved from an engagement position; in which it is non-rotatably connected with the clamping component to a rotary position in which it is freely rotatable relative to the clamping component. In the rotary position, the operating lever is disposed closer to the clamping component than in the engagement position.

A wheel to axle securement system (WASS) that facilitates securing a vehicle wheel to an axle, or removal of a vehicle wheel from an axle. The WASS includes a wheel hub with a centered opening, an axle, and a quick release ball lock pin that is dimensioned to be inserted into an axle insert within the axle. The wheel hub is placed onto the axle through the opening such that the axle end is adjacent an outer surface of the hub. The lock pin has at least two balls that extend from or retract into the pin's shaft. A button on the pin actuates an internal assembly. When the button is released, the balls extend outward. Once the hub is on the axle, the pin button is depressed and the pin is inserted into the axle insert. When the button is released the balls are located adjacent and in contact with the end of the axle insert, which functions as a barrier that precludes the pin from being removed from the insert. Once the pin is in place, the hub is secured onto the axle.

A vehicle with a traction mechanism unit, a method for assembling a vehicle, a method for avoiding pedal kickback in a vehicle, a method for transmitting a drive torque of a single-track or multi-track vehicle via a traction mechanism unit, and a method for eliminating interaction between a drive train with a traction mechanism unit and a suspension/damping device in a single-track or multi-track vehicle, and a corresponding traction mechanism unit.

A dropout assembly comprises a first dropout that includes a first through hole configured to receive an axle for a bicycle wheel. The dropout assembly also comprises a second dropout that includes a second through hole and a mounting surface. The second through hole is configured to receive the axle for the bicycle wheel. The dropout assembly also includes a rotational control mechanism that is configured to mount to the mounting surface of the second dropout. The rotational control mechanism includes a nut and a nut cover.

A quick release device for at least partially muscle-powered two-wheeled vehicles, having an axle unit and a clamping mechanism. The axle unit includes an axle extending in the axial direction, a locking device at the first end of the axle unit and a fastener at a second end of the axle unit. The clamping mechanism is suitable for mounting and demounting the axle unit to a two-wheeled vehicle. The clamping mechanism has an operating lever and a clamping component, the latter is non-rotatably coupled with the axle unit and is decoupled from the axle unit. The clamping mechanism has an intermediate device with an actuating unit, which ensures in a first position a non-rotatable connection of the clamping component and the operating lever, and in a second position, allows the operating lever to pivot relative to the clamping component while the clamping component is non-rotatably coupled with the axle unit.

A quick release skewer assembly for use in mounting a wheel to wheel supporting fork includes a camming lever that is pivotally coupled to the skewer for pivoting relative to the skewer between lever closed and lever open positions. With the skewer properly tightened on the fork, pivoting the lever to the lever closed position clamps the wheel to the fork with a clamping force. A biasing member coupled to the skewer and to the fork applies a biasing force that biases the lever toward the lever open position. When the skewer is insufficiently tightened, the biasing force moves the lever to a bias rest position between the lever closed and open positions. The positioning of the lever in the bias rest position provides a visual alert to an individual using a vehicle, such as a bicycle, that the wheel is insufficiently tightened.