The Quarq DFour Power Meter is designed for use with Shimano DURA-ACE 9100 chainrings. Shimano Ultegra R8000 and 105 R7000 rings also work. However, they don’t match the 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.