Abstract: An indicating device of a bicycle standing tube comprises a supporting seat having buckling teeth; the supporting seat having an indication portion; the indication portion having indications; a clamping device having engaging teeth engageable to the buckling teeth of the supporting seat; each of two sides of an tooth at a center portion of the engaging teeth having a rib; arrangement of the engaging teeth being corresponding to the indications of the indication portion so that the indications of the indication portion can indicate the orientation of the engaging teeth and the ribs being used as a reference point in adjusting the orientation of the clamping sheet. The supporting seat has an indication portion and the clamping device has an arrow so that the orientation of the cushion can be indicated by the indication portion and the arrow. The user can adjust the orientation accurately by the assistance of the indication portion.

Abstract: A bicycle rim includes a plurality of recesses defined in an inner periphery thereof and a through hole is defined through the rim and shares a common axis with the recess corresponding thereto. A plurality of spokes each have a threaded hole defined in a first end thereof which is fitted in one of the recesses and a plurality of bolts extend through the through holes and are threadedly connected to the threaded holes in the spokes. The through holes are small so that they do not reduce the structural strength of the rim and the end of each spoke is fitted in the recess to further position the spokes to the rim. A second end of each of the spokes is connected to a hub by extending a bolt through the hub and threadedly connected to the second end of each spoke.

Abstract: A bicycle wheel includes a rim with a plurality of holes defined therethrough and each hole receives an insertion section of a nut. The insertion section is enclosed by an inner periphery of the hole and an end surface of the insertion section is in flush with an inner periphery of the rim. A threaded hole is defined in the end surface of the insertion section. A plurality of spokes each have a threaded end at a first end thereof so as to be threadedly connected to the threaded hole of one of the nuts. A hooking end is connected at a second of each spoke so as to be connected to a hub.

Abstract: A bicycle wheel includes a rim with a plurality of holes defined therethrough and each hole receives an insertion section of a nut. The insertion section is enclosed by an inner periphery of the hole and an end surface of the insertion section is in flush with an inner periphery of the rim. A threaded hole is defined in the end surface of the insertion section. A plurality of spokes each have a threaded end at a first end thereof so as to be threadedly connected to the threaded hole of one of the nuts. A hooking end is connected at a second of each spoke so as to be connected to a hub.

Abstract: A bicycle rim includes a plurality of recesses defined in an inner periphery thereof and a through hole is defined through the rim and shares a common axis with the recess corresponding thereto. A plurality of spokes each have a threaded hole defined in a first end thereof which is fitted in one of the recesses and a plurality of bolts extend through the through holes and are threadedly connected to the threaded holes in the spokes. The through holes are small so that they do not reduce the structural strength of the rim and the end of each spoke is fitted in the recess to further position the spokes to the rim. A second end of each of the spokes is connected to a hub by extending a bolt through the hub and threadedly connected to the second end of each spoke.

Abstract: A retainer assembly of a spindle tube device comprises: a crank having a through hole; a spindle tube connected to the crank through a washer; the spindle tube being inserted into the through hole of the crank; a teeth portion being formed at an inner wall of the through hole, but not at end portions near outer edges of the inner wall of the through hole; one of the end portion of the inner wall of the through hole being installed with a washer groove for receiving the washer; a diameter of the washer groove being slightly larger than that of the teeth portion; a teethed protrusion being formed at one end portion of an outer wall of the spindle tube; the teethed protrusion capable of being coupled to the teeth portion of the through hole. After assembly, the teethed protrusion is engaged to the teeth portion.

Abstract: A bicycle seat post includes two arcuate plates and a reinforcement board sandwiched between the two arcuate plates. Each arcuate plate has two lengthwise end surfaces and each end surface includes an inner corner edge and an elongate surface defined in an outer corner edge thereof. The two lengthwise end surfaces contact two opposite sides of the reinforcement board. Each of lengthwise top surface and lengthwise bottom surface of the reinforcement board is connected between the two respective elongate surfaces of the two arcuate plates so as to form two longitudinal grooves in an outer surface of the seat post.

Abstract: A reinforcement structure for a bicycle includes a rim, and a plurality of carbon-fiber locking blocks, spokes and screw members. The carbon-fiber locking blocks are locked on the rim by the screw members and the spokes. Each of the carbon-fiber locking blocks has a first side formed with a planar surface rested on a respective screw member and a second side formed with an arc-shaped surface closely rested on the rim. Thus, the external force applied on each of the screw members is evenly distributed by the arc-shaped surface of the respective carbon-fiber locking block, thereby preventing the screw members from being distorted due to a stress concentration, so as to enhance the safety of riding the bicycle.

Abstract: A crank includes a through hole defined in a first end thereof for receiving one of two ends of an axle in the bottom bracket, and a threaded hole defined in a second end of the crank so as to be connected with a pedal. A passage is defined through the crank and communicates with the through hole. A positioning assembly is received in the passage and includes two tubular members which are pulled toward each other by a bolt threadedly extending through the two tubular members. A concave surface is defined in each of the two tubular members so that the axle is pressed in position by the concave surfaces of the two tubular members.

Abstract: A handlebar assembly for bicycle includes a handlebar composed of a central fitting and two wings which are integrally connected to two ends of the central fitting. Two grips are connected to the two wings respectively. Two armrests each have a recess defined in an outer periphery thereof and the central fitting of the handlebar is engaged with the recess of each of the two armrests. Two C-shaped members are mounted to the central fitting and two bolts extend through two ends of each of the C-shaped members and are connected to the two armrests. The two armrests are pivotable about the central fitting when needed.

Abstract: A bicycle handlebar includes a straight central fitting section and two wings are integrally connected to two ends of the central fitting section. Each wing has a tear-shaped cross section including a long axis and a short axis which orthogonally intersects the long axis at an intersection point. A distance from the intersection point to a front end of each of the tear-shaped wings is longer than a distance from the intersection point to a rear end of each of the tear-shaped wings.

Abstract: A bicycle headset assembly is mounted to a steering tube extending through a head tube of the bicycle. The headset assembly includes a race connected to a top end of the bicycle head tube and a bearing set is engaged with an inner periphery of the race. A positioning ring is engaged with an inner periphery of the bearing set and mounted on the steering tube. A cap is mounted to the race and presses the positioning ring. A pressing ring is mount to the steering tube and presses on a top surface of the cap by the handlebar stem.

Abstract: A headset assembly for a bicycle includes a bearing set engaged with an inner periphery of a top end of a head tube and an outer periphery of a positioning ring is engaged with an inner periphery of the bearing set. The inner periphery of the positioning ring is mounted on a steering tube. The head tube has a threaded outer periphery and a cap has a threaded inner periphery which is threadedly connected to the threaded outer periphery of the head tube.

Abstract: A bicycle rim includes a plurality of holes defined therethrough and each hole has a recess defined in an inner periphery of the rim. A diameter of the recess is larger than a diameter of the hole so that an end of a spoke is engaged with the recess. A screw extends through the hole in the rim and threadedly engaged with a threaded hole defined longitudinally in the end of the spoke.

Abstract: A bicycle headset assembly is mounted to a steering tube extending through a head tube of the bicycle. The headset assembly includes a race connected to a top end of the bicycle head tube and a bearing set is engaged with an inner periphery of the race. A positioning ring is engaged with an inner periphery of the bearing set and mounted on the steering tube. A cap is mounted to the race and presses the positioning ring. A pressing ring is mount to the steering tube and presses on a top surface of the cap by the handlebar stem.

Abstract: A crank includes a through hole defined in a first end thereof for receiving one of two ends of an axle in the bottom bracket, and a threaded hole defined in a second end of the crank so as to be connected with a pedal. A passage is defined through the crank and communicates with the through hole. A positioning assembly is received in the passage and includes two tubular members which are pulled toward each other by a bolt threadedly extending through the two tubular members. A concave surface is defined in each of the two tubular members so that the axle is pressed in position by the concave surfaces of the two tubular members.

Abstract: A bicycle rim includes a plurality of holes defined therethrough and each hole has a recess defined in an inner periphery of the rim. A diameter of the recess is larger than a diameter of the hole so that an end of a spoke is engaged with the recess. A screw extends through the hole in the rim and threadedly engaged with a threaded hole defined longitudinally in the end of the spoke.

Abstract: A crank structure includes a main body, a crank shaft, and a composite material layer. In assembly, after the crank shaft is mounted on the main body in a close fit manner, the composite material layer is coated around the outer periphery of the main body, so that the main body and the crank shaft have an enhanced combination strength. Thus, the crank shaft mounted on the main body in a close fit manner will not detach from the main body during travel of the bicycle.