Shimano Ultegra CS-R8000

Yes, the CS-R8000 is designed for standard Shimano/SRAM 11-speed road freehub bodies. It is a direct replacement for most 11-speed road groupsets.

Yes, this cassette is engineered to handle the higher torque loads associated with e-bike motors. Its robust construction ensures it maintains shifting performance even under the increased stress of an electric drivetrain.

This particular model features a 12-25 tooth range. The specific cog progression is 12-13-14-15-16-17-18-19-21-23-25, which offers tight gear steps ideal for maintaining a consistent cadence on flatter terrain.

The Ultegra level utilizes more refined tooth profiling and materials compared to 105 or Tiagra models. This results in noticeably smoother, faster, and more precise gear changes, particularly under load.

It is designed to work optimally with Shimano 11-speed chains, such as the HG-X11 series. While it may function with other 11-speed chains, using a matching Shimano chain will provide the best shifting reliability.