The Shimano CS-HG51-8 is an 8x cassette on Alivio level. It features Hyperglide (HG) technology for precise, smooth shifting and is designed for trekking and MTB use. Compared to earlier 8- and 7-fold cassettes, it is characterized by a lower weight. Features Sprocket Material: steel Freehub Body Compatibility: Shimano MTB Note: compatible with Shimano Road 11-speed with a 1.85 mm spacer Recommended Chain: IG, HG (e.g. CN-HG71) HG cassette with chrome-plated steel sprockets Specifications Speed- 8 Speed Combination- (11-28T)11-13-15-17-19-21-24-28, (11-30T) 11-13-15-17-20-23-26-30, (11-32T) 11-13-15-18-21-24-28-32 Additional Info Country of Origin: Malaysia/Japan Imported By: Shimano South Asia Pvt Ltd. , 19 , (Ground Floor) Kumara Krupa Road , Bangalore – 560 001 , Karnataka , India. Net Quantity: 1N Customer Care Address: 291, 10 Main, 5 Block, Jayanagar, Bangalore - 560041. Ph: (080)47183232, Email: support@bumsonthesaddle.com Commodity: Cassettes