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 can be adjusted to suit the rider's requirements. A link couples the arm to the second portion of the bicycle and the link maybe adjustable in length so that the bicycle geometry can be adjusted.
This application is a continuation-in-part of U.S. application Ser. No. 09/761,182, now abandoned, filed on Jan. 18, 2001 which is a continuation-in-part of international application number PCTCA99/00768 filed on Aug. 18, 1999 and a continuation-in-part of U.S. application Ser. No. 09/135,059 filed on Aug. 18, 1998 now abandoned.
A crank of a shock absorber for a bicycle has two ends respectively pivotally connected with a bicycle frame and a rear shock absorber, having a round hole and a disc fitted in the round hole, a rear bearing hole, a narrow groove communicating with the round hole and the rear bearing hole, a nut at one side of the groove and a bolt extending from outside through the groove to screw with the nut, the disc having an eccentric hole; a rear shock absorber has a pivot base to face the eccentric hole for a micro-adjusting rod to extend therein stably. Then the micro-adjusting rod is rotated for an angle to alter the angle of the shock absorber relative to the bicycle frame, so a user can adjust elastic force of the shock absorber according to the capability, the body weight and road conditions.
