The Quarq DFour Power Meter is designed for use with Shimano DURA-ACE 9100 chainrings. Shimano Ultegra R8000 chainrings and 105 R7000 rings also work, however they will not match the shape or color of the power meter as nicely.
If you have DURA-ACE 9000, Ultegra 6800 or 105 5800 chainrings, you have two options:
1.) Use the current generation Quarq DFour power meter that we sell and upgrade your chainrings to 9100/8000/7000 (recommended).
2.) Try to locate an older generation DFour. Please note, we don’t sell this older version so you would probably have to find a used one – and older used power meters come with their own set of issues – but totally your call.