Each SRAM Post Mount Adapter kit includes everything you need to update your bike to a larger sized disc rotor. Each package includes both CPS and standard hardware. 

To choose the correct sized adapter, find out your bicycle's post-mount length and add the difference for the size rotor you would like. For example, if you have a 160mm post-mount frame and want a 200mm rotor, you will need the 40mm adapter. 

Specs:

• Includes CPS and standard hardware
• Manufacturer's Item Number:
• 20mm -  00.5318.008.003
• 40mm - 00.5318.007.003