FIELD: machine building.
SUBSTANCE: invention relates to the field of sport bicycles, in particular to the racing bicycle rear wheel cassettes. Racing bicycle rear wheel cassette consists of a set of driven gears mounted on the free wheel hub through the spacing washers. Cassette is secured against the driven gears axial movement by the locking bushing. According to the first alternative, on the locking bushing outer surface additional driven gears are made, separated from each other by the cylindrical recess. According to the second alternative, on the locking bushing outer surface additional gear and a cylindrical protrusion are made, arranged from the locking bushing threaded side.
EFFECT: enabling increase in the driven sprockets number on the bicycle rear bushing free wheel hub.
4 cl, 3 dwg
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