SunRace CSR91 9-Speed Nickel Plated Cassette with Alloy Lockring and Gray Spacer Weight 273 grams 11-25 9 Speed cassette featuring a nickel plated finish Black composite spacers and black anodized aluminum lockring Gear Combination 11-12-14-16-18-21-24-28-32 Chain compatibility 6.6mm Weight 273 grams