A cassette of base metal sprocket wheels (so-called ‘free hub cassette’) without a free-wheel mechanism. The free hub cassette consists of seven sprocket-wheels fixed together, two separate sprocket-wheels and a washer. The smallest sprocket-wheel has 11 teeth and the largest 32 teeth. The free hub cassette is designed to be placed over the free-wheel mechanism (integrated in the hub body). Thereafter, the drive shaft of the rear wheel can be disconnected from the hub body (free- wheel). This enables the cyclists to keep the pedals still or to pedal backwards while the bicycle is in forward motion. The free-wheel mechanism is not present upon presentation.
[1][1]. https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX%3A32015R2321