ISO 10230:1990

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ISO 10230:1990 is an International Standard that specifies the mating dimensions and tolerances for the sprocket and splines of the hub on a bicycle, specifically for internally geared hubs or backpedal brake hubs. It ensures compatibility between the hub and sprocket. The standard does not apply to specialized bicycle types like tradesmen's delivery bikes, tandems, or toy bicycles, according to iTeh Standards.