The cranks are truvativ Descendant 7k Eagle DUB. The chainring I took off is direct mount, but as you can see in the picture the sigeyi power meter has the correct three bolt mounts for my crankset and has the 104 BCD spacing. I believe the bolts came with the absolute black chainring, otherwise they are just standard chainring bolts. With 104 BCD spacing if you need smaller than a 30 Tooth chainring you will have to go with a different system.
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