The Shimano Altus CSHG31 8 Speed Cassette is a great quality cassette for your beginner bike It has a low 11T gear that is effective on those harsh climbs The Powerglide technology does what its name suggests you glide effectively through the gears without a hitch Features 1130T 11131517202326 30T 8 Speed Hyperglide technology Enlarged sprocket window design for lighter weight 315g weight

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