Abstract: In a method of making a ring for a fluid drive assembly, for example a bearing ring for a hydraulic or pneumatic piston or rod, a substrate is formed by two fibrous tapes with fibres arranged in more than one direction, with a tape of unidirectional fibres sandwiched between them. The substrate is passed through a bath of thermosetting resin so that resin is picked up on the substrate. The substrate passes through a die which shapes it and cures the resin, so that the substrate is held by the resin in a desired cross-sectional configuration. Choice of the material of the fibres of the tapes enables desired surface characteristics to be given to the finished material. The substrate is then out into lengths either by the manufacturer or by the end-user, to form rings. This method enables a material for rings to be produced substantially continuously, and the substrate may be rolled up before it is cut to enable it to be transported and stored easily.