The shimano hg50 7 speed cassette comes in grey is available in two different sizes and has been developed with hyperglide sprockets the shimano hg50 makes use of the latest technology and hard work in order to deliver crisp smooth shifting masters of the cycling industry shimano are market leaders when it comes to producing flawless bike parts offering a wide range of reasonably priced components to satisfy riders of all genres the shimano hg50 cassette joins the list of quality products