Abstract: A chain includes a plurality of inner links in which adjacent two are connected by an outer link. The inner link includes at least one first bushing mounted between the two inner plates and at least one roller mounted in the inner link, outer link and first bushing. The roller includes an engaging section which extends on its outer periphery thereof and in a curved shape with a uniform radial distance with respect to a center thereof. The first bushing includes a retaining section in which the engaging section of the roller moveably fits, and the first bushing and roller includes a gap defined therebetween so that the outer link is able to tilt together relative to the inner link.

Abstract: A flexible bicycle chain comprises a plurality of chain unit, each chain unit including: two inner chain plates; each inner chain plate having a shape like an “8”, two outer chain plates; each outer chain plate having a shape like an “8”, a size of each outer hole of the outer chain plate being smaller than that of each inner hole of each outer chain plate; a roller unit having a receiving space; a connecting pin received in the receiving space of the roller unit; the connecting pin being longer that the roller unit. Each roller unit includes a middle annular groove, two inclined annular surfaces; the middle annular groove is at a middle section of the roller unit and has a concave cambered shape; and the two inclined annular surfaces are at two ends of the middle annular groove.

Abstract: A bicycle brake mechanism includes a body located above a front wheel and a pivotable member is pivotably connected to the body. A hydraulic device is connected to the pivotable member so as to pivot the pivotable member. Two brake arms are located on two sides of the rim and two respective first ends of two link units are respectively connected to two ends of each of the brake arms. The two respective second ends of the links units are connected to two ends of the body. One end of each of the two brake arms is pushed by the pivotable member when the hydraulic device is activated so as to pull the pivotable member. The two link units make the two brake arms to be simultaneously moved to stop the rim.

Abstract: A bicycle brake mechanism includes a body located above a front wheel and a pivotable member is pivotably connected to the body. A hydraulic device is connected to the pivotable member so as to pivot the pivotable member. Two brake arms are located on two sides of the rim and two respective first ends of two link units are respectively connected to two ends of each of the brake arms. The two respective second ends of the links units are connected to two ends of the body. One end of each of the two brake arms is pushed by the pivotable member when the hydraulic device is activated so as to pull the pivotable member. The two link units make the two brake arms to be simultaneously moved to stop the rim.

Abstract: A braking device for a bicycle activated by transverse pull mainly comprises a lever set with a pair of left and right braking components, each having an active member and a passive member that are opposite wedged slab bodies slidably engaged. The active members are further attached with braking members. The active members will be driven by the lever set and urge an according slide motion of the passive members away from the active members, whereby the braking members will pinch the associated front bicycle wheel and force it to stop rotating.

Abstract: A bicycle brake mechanism includes a body located above a front wheel and a pivotable member is pivotably connected to the body. A brake cable extends through the front fork and is connected to the pivotable member. Two brake arms are located on two sides of the rim and two respective first ends of two link units are respectively connected to two ends of each of the brake arms. The two respective second ends of the links units are connected to two ends of the body. One end of each of the two brake arms is pushed by the pivotable member when the brake cable is pulled. The two link units make the two brake arms to be simultaneously moved to stop the rim.

Abstract: A bicycle chain includes a plurality pairs of outer plates and inner plates. Each pair of the outer plates is connected at two opposite ends to two pairs of the inner plates by connectors connected to the inner plates. Each connector has a rivet extending therethrough and two ends of the rivet are respectively connected to the two opposite ends of the outer plates. Each rivet has a protrusion extending radially outward from the outer periphery thereof and the protrusion is in contact with an inner periphery of a central passage of the connector corresponding thereto. There is a gap defined between the rivet and the inner periphery of the central passage so that the chain has more flexibility.