Shimano CS-HG51 8-Speed Cassette

Shimano, CS-HG51, 8sp. cassette, 11-32T, 11-13-15-18-21-24-28-32

Precise and consistent HyperGlide shifting performance. Long leg spacer for further weight reduction. Enlarged sprocket window design for lighter weight.

• Excellent choice for bikes with "compact" chainwheels (fewer than 48 teeth on the largest) 
• It is generally good practice to replace the chain when you replace the cassette. 
• This cassette will index with any Shimano-type 8-speed shifter, but does require a wide-range (touring/mountain) rear derailer.