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@Vince
Initial feedback is that they feel natural to ride and I thought it was easier to pedal thus making me faster / less tired.
I replaced Shimano Ultegra 6800 50t/34t with Doval 50t/34t 16.5%.
Seeing it felt easier to push pedals around, I would have gone for a 52t Doval.
The quality is lesser than OEM Shimano but that is to expect when you spend 55$ on a pair of chainrings.
I could feel a slight flex (with slight FD rub) when off the saddle pushing hard so I suspect that if you make serious watts, these won't be good for you.