a FD is a FD. Use whatever. It's the rings that will make the difference. I don't use sram chainrings on my X bike and it's shifts like a dream. I use red rings on my road bike with a rival FD and while it's not shimano, it works. The new rings are what makes the new front shifting. The yaw or whatever it is is whatever to me. Use a shimano or whatever you want. I've even used a centaur triple with a shimano double bike.
It's going to be hard to have backwards compatible rings for red so I would guess from the top down the new "rings" will come with new groupsets for force, rival and apex that incorporate the same ideas for red making them NOT backwards compatible for old sram cranks.
The yaw thing is yet another gimmick to get rid of trim.
Originally Posted by
ColinL
I suspect that the small community of people who installed Ultegra or Dura-Ace FDs on their SRAM bikes might care. People who still have full SRAM drivetrain and want improvements also care.
Also of note, I expect the chainrings to hit all the SRAM road groups quickly. You can already get the new X-Glide rings on X5 mountain cranks. So I expect them to hit Force and Rival real soon and Apex before overly long. (For people not familiar with SRAM MTB gear, X5 is pretty humble. Think Apex, or if a road group existed below Apex, that would be it.)