You can choose in the following combinations:

11-23t cassette 1030 + PC1031 chain SRAM sølv 11-12-13-14-15-16-17-19-21-23

11-26t cassette 1030 + PC1031 chain SRAM sølv 12-13-14-15-1617-19-21-23-26

11-32t cassette 1030 + PC1031 chain SRAM sølv 11-12-13-15-17-19-22-25-28-32

11-36t cassette 1030 + PC1031 chain SRAM sølv 11-13-15-17-19-22-25-28-32-36

Sram cassettes have a very high quality compared to the other players at the market. It's a good value for money buy, and a design optimized for best shifting possible

​Mounting:

The cassette fits onto your freehub body and is fastend with a lockring, which is tightend with a cassette wrench

Lockring is included in all combinaitons