Suspension system for a bicycle has a damper assembly coupled to a first portion of the bicycle relatively movable to a second portion of the bicycle and includes a hydraulic damper made of polyurethane material. The damper assembly has an outer casing from which extends an arm for applying a torque to the damper. The arm may be segmented or include a series of apertures for coupling to the second portion of the cycle so that the effective length of the arm and the torque applied to the damper c...

A two wheeler frame, in particular a bicycle frame including a first frame part having an upper tube and a second frame part having a mounting for a wheel of the two wheeler and which is pivotally linked to the first frame part, whereby the second frame part is resiliently supported against the first frame part via at least one spring element, in which the upper tube, at least in an area of its longitudinal extent, is divided into at least two sections enclosing a building space between them and...

According to the present invention, there is provided a suspension device for a bicycle comprising a center frame for supporting a saddle; a front frame for supporting a front wheel at a first end of the front frame, the front frame being secured to the center frame at a second end of the front frame so as to pivot about a first pivot axis; a rear frame for supporting a rear wheel at a first end of the rear frame, the rear frame being secured to the center frame at a second end of the rear frame...

The parallelogram suspension system can be used for both the front and rear wheels of a bicycle, individually or together. A rear parallelogram suspension system will absorb less propulsive energy than most large travel rear suspension systems, while offering greater travel and better adjustability than "pivotless" rear suspension systems. A front parallelogram suspension system will move in constant geometric alignment to the main frame of the bicycle, can have no play in the fore/aft or latera...

A bicycle has a front frame portion including a front wheel and handlebars and a rear frame portion including a crank housing, a pedal crank, a rear wheel, and a seat with a flexible fiberglass spring plate removably mounted between upper portions of the front and rear frame portion and a steel cable extending from the crank housing of the rear frame portion to the upper portion of the front frame portion. During operation of the bicycle, the front frame portion can flex with respect to the rear...

A tricycle having a front frame supported with one front wheel and a rear frame supported with two rear wheels, wherein the front frame is connected with the rear frame on the axis longitudinal of the tricycle in the relation that the front frame is capable of being inclined to one side or the other with respect to the rear frame. The tricycle is provided with a torsion bar arranged between the front frame and the rear frame on the axial line so that the torsion bar is subjected to only torsion ...

A bicycle frame having shock absorbing characteristics. The bicycle frame generally comprises a head tube and a seat tube having an elongate crossbar rigidly attached thereto and extending therebetween. Rigidly attached to and extending between the seat tube and the crossbar is a shock absorber. The bicycle frame further includes first and second chain stay members having front ends pivotally connected to the opposed sides of an axle receiving sleeve attached to the lower end of the seat tube an...

A bicycle frame is provided with a steering tube, a saddle tube, a top tube and an inclined tube as well as a fork for a front wheel held on the steering tube and another fork or swing unit for a rear wheel as well as a pedal bearing unit held on the frame. The top tube has a forward first tube section fastened to the steering tube and connected with a second saddle tube section fastened on the saddle receiving tube. The forward tube section may comprise an elongated tube part of the inclined tu...

A suspension device for use in mounting a bicycle seat on a bicycle frame. The device has an upper guide member telescopically, non-rotatability mounted in a lower guide member. An air cushion is provided between the guide members for use in cushioning movement of the guide members toward each other. First connecting members are provided on the upper portion of the upper guide member for use in connecting a bicycle seat to the upper member. Second connecting members are provided on the front, to...

An integrated shifting and suspension system for a bicycle coordinates suspension settings with gear selections. A mechanical cable linkage between a derailleur and an adjustable shock absorber couples the shifting and suspension settings of a bicycle. This coupling automatically adjusts the suspension to a firm setting when a rider selects a low gear and a soft setting when a rider selects a high gear. Movement of the derailleur corresponding to a gear selection moves the cable, thus actuating ...