The sunrace mx3 10 speed cassette 11 42t this 10 speed cassette is the perfect solution for riders that run a 1 x 10 system who need a little more at the bottom end who don39t want to resort to an expensive expander sprocket and those who want an even and smooth shift between all sprockets sunrace mx3 10 speed cassette 11 42t features mx3 cassette 10 speed wide ratio 6 sprockets on 2 alloy spider carriers a7075 largest sprocket alloy lockring and spacers finishblack