Abstract: A swivel device for bicycles includes a first ring adapted to be mounted on a head tube of a bicycle. The first ring has a plurality of first protrusions formed thereon. Each first protrusion connects to a first brake cable. A second ring is adapted to be mounted on the head tube. The second ring has a plurality of second protrusions formed thereon. Each second protrusion connects to a second brake cable. A positioning sleeve encloses the first and the second rings for positioning the first and the second rings in place. The first ring is able to pivotally swivel relative to the second ring. When braking, the second brake cables dragged to lift the second ring upwardly and the first ring moved upwardly to drag the first brake cables upwardly.

Abstract: A seal device for a bicycle steering bearing assembly includes a seal ring having a tubular insertion and a flange extends radially horizontally from one end of the insertion. A tapered mask has a first open end which is engaged with a groove in an outer periphery of the insertion and a second open end of the mask receives the steering bearing assembly therein. A locking nut is securely mounted to the steerer tube and has another groove defined in an inner periphery of one end thereof. The other end of the insertion is engaged with the groove of the locking nut.

Abstract: A bicycle treadle bearing assembly comprises a seat being a concave receiving portion at an upper portion thereof; a lower portion of the seat being a thread portion; a bearing; a periphery of the bearing being formed with a plurality of axially arranged rolling posts each of which is rotatably axially; a supporting casing arranged around the bearing; an inner surface of the supporting casing being corresponding to that of an outer surface of the bearing. In assembly, the supporting casing encloses the bearing therein and then the supporting casing and the bearing are placed into the receiving portion. The bearing has a tapered outer surface and an inner surface of the supporting casing is a tapered surface corresponding to the outer surface of the bearing. A cover is installed upon the supporting casing and the bearing so as to seal the bearing and the supporting casing therein.

Abstract: A bicycle front connection assembly comprises an upper round seat having an upper small portion engaged to the front rube; a lower side of the upper large portion having an annular trench having a plurality of balls and being filled with oil; an inner side of the annular trench being a ball round disk having a plurality of grooves each having a steel ball therein; so that the upper round seat can be engaged to the bi-forked tube to form as a bearing; and a lower round seat having a lower large portion at a lower side thereof and a lower small portion at an upper side thereof; a top side of the lower large portion of the lower round seat having a ball round disk; then a lower cover covering an opening of the lower large portion so as to form the structure of the present invention.

Abstract: A seal device for a bicycle steering bearing assembly includes a seal ring having a tubular insertion and a flange extends radially horizontally from one end of the insertion. A tapered mask has a first open end which is engaged with a groove in an outer periphery of the insertion and a second open end of the mask receives the steering bearing assembly therein. A locking nut is securely mounted to the steerer tube and has another groove defined in an inner periphery of one end thereof. The other end of the insertion is engaged with the groove of the locking nut.