This is a custom made 6 speed cassette for the 120 OLN (over lock nut) rear cassette hubs. These hubs have a shorter free hub body and will only accept this cassette. Made from 6 individual Shimano cogs and spacers.
Gearing is 14-16-18-21-24-28. Works best with 9 speed chains.
Custom configurations are available on request and have a 4 week turnaround.
Hub shown in pictures for reference purposes.