Shimano Ultegra CS-6800 11 speed cassette for 10 speed wheels

This is a modified Shimano Ultegra 11 speed cassette that will allow you to use an 11 speed drivetrain with wheels meant for 10 speed drivetrains.
This is also useful if the wheels you like are only available up to 10 speed but you want to use them with an 11 speed drivetrain.

**Please contact us before purchasing to determine if the cassette will be compatible with your wheels of choice!**