Campagnolo Sprocket Unit 11 Speed 17A-19B-21B 11S-791

This sprocket unit from Campagnolo is designed as a replacement part for compatible 11-speed Campagnolo cassette setups. The 17-tooth, 19-tooth, and 21-tooth sprockets are essential when these middle cassette cogs are worn, damaged, or causing rough shifting under load. Replacing worn sprockets can help restore smoother chain engagement and more reliable gear changes, but the exact cassette model and Campagnolo 11-speed compatibility should always be checked before installation.

- Replacement sprocket unit for compatible Campagnolo 11-speed cassettes
- Includes 17T, 19T, and 21T sprockets
- Useful for replacing worn or damaged middle cassette cogs
- Helps restore smoother shifting and better chain engagement

Specifications
Brand: Campagnolo
Model: 11S-791
Type: Sprocket unit
Speed Compatibility: 11
Number Of Teeth: 17/19/21
Color: Silver