A shock absorber

The present invention relates to a position sensitive shock absorber having a bypass passage adapted to communicate a working fluid between two positions in a bore, and an adjustable one-way valve arranged to direct working fluid flowing through the bypass passage, the adjustable one-way valve comprising a resiliently flexible shim having a first end fixed relative to a port, the port being in fluid communication with the bypass passage, and a free end extending from the first end and covering the port, and an adjuster having a fulcrum arranged against the shim to form a pivot, whereby when the working fluid exits the port, the free end is urged away from the port and flexes the shim about the pivot, thereby allowing the working fluid to flow through the port, and when the working fluid enters the port, the free end is urged towards the port and covers the port, thereby substantially preventing the working fluid flowing through the port, and at least one of the shim and adjuster are displaceable relative to each other, thereby moving the pivot relative to the free end.