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.
You can also install Shimano 12-speed chainrings on this power meter such as DURA-ACE 9200 chainrings, Ultegra R8100 chainrings or 105 R7100 rings. However, the shape of the chainrings does not match the power meter (please see the image below). This is a cosmetic issue only, but we understand this is important to customers.
Please note, the DFour is not compatible with DURA-ACE 9000, Ultegra 6800 or 105 5800 chainrings. If you have any of these older chainrings, you would need to upgrade your chainrings to one of the compatible versions above.