Oneup components 1x10 cassette sprocketthe oneup components 16t sprocket replaces the 15t and 17t sprockets within a 10 speed wide range cassette to smooth out shift progression optimised to work with both sram and shimano cassettes the 16t sprocket is the perfect addition to any wide range cassette conversion oneup components is a small team of passionate mountain bikers dedicated to bringing genuine value to the mtb market oneup was founded by three former race face engineers chris john