Shimano Sprocket Unit 19-21T 9S Hyperglide Ultegra

The Shimano Sprocket Unit 19-21T 9S Hyperglide Ultegra is a genuine replacement sprocket pair for 9-speed Ultegra road cassettes utilizing the HG spline standard. It replaces the 19T and 21T cogs as a matched unit, restoring crisp shifting and precise gear steps in the middle of the cassette where you spend most of your time. Crafted from high-quality steel with Shimano’s Hyperglide tooth profiling, these sprockets guide the chain smoothly during both up- and downshifts, reducing noise and enhancing drivetrain feel. This is the ideal solution when individual cogs are worn but the rest of the cassette and freehub remain in good condition, offering a cost-effective way to refresh a 9-speed Ultegra drivetrain without the need to replace the entire cassette.

- Original Shimano Ultegra Hyperglide sprocket unit with 19 and 21 tooth cogs
- Designed for 9-speed Ultegra road cassettes using the HG spline standard
- Restores smooth, precise shifting in the mid-range gears you use most
- Hyperglide tooth profiling for fast, quiet gear changes under load
- Quality steel construction for long-lasting durability and clean power transfer
- Cost-effective replacement when only a couple of cassette sprockets are worn

Specifications
Brand: Shimano
Model: Hyperglide
Type: Sprocket unit
Size: 19 - 21 T
Speed: 9 S
Color: Silver