Sunrace CSMX8 11sp Cassette 11-42t - Silver CheckoutSpec= 11-42t while the F3 model is

while the F3 model is made for softer

woom Steering Limiter

painted steel barrel and piston

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Sunrace CSMX8 11sp Cassette 11-42t - Silver CheckoutSpec= 11-42t while the F3 model isLightweight wide range mountain cassette compatible with HG 8 11sp freehub bodies 7075 aluminum largest cog, all other cogs are steel 6 cogs on 2 aluminum spiders, plus aluminum lockring and spacers SRAM derailleurs are generally compatible, Shimano derailleurs require a longer B tension screw (use WQ 2299) TECH SPECS model CSMX8 freehub type HG speed 11 range 11 42 cogs 11,13,15,17,19,21,24,28,32,36,42 color silver weight 401g