- upgrade 4 spds wheelset to 6 spds
6 spds - 11/13/17/21/24/28
- upgrade 5 spds wheelset to 7 spds
7 spds - 11/13/15/18/21/24/28
- Suitable for shimano type freebody.
Now you can upgrade P/T Line wheelset to 7spds or any 4 speeds wheelset to 6 speeds with Hex design cassette.