Had these chainrings dropped onto Quark D-Four Power Meter Cranks and fit like a glove. The rest of the gruppo is all Ultegra and performs flawlessly as expected. Dura-Ace is nice, but Ultegra is the workhorse of the Shimano line...light, bulletproof, affordable and dependable! Great deal from Western Bike Works!
I'm convinced SRAM is going 1x because they can't infringe on Shimano's awesomeness and actually make a decent front derailleur. I recently switched back to a Shimano front and love it.