Shimano Sora CS-HG50 9-Speed Cassette The Shimano Sora HG50 9-speed cassette features Hyperglide sprockets with a computer designed tooth config for smoother, crisper gear shifts even under load. TheShimano Sora HG50 9-speed cassette features Hyperglide sprockets with a computer designed tooth config for smoother, crisper gear shifts even under load.
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