10sp / 11sp compatibility question

[kgreene10]

I have a 10sp SRAM S975 Quarq PM with Red rings. Anyone know how well this will work with DA 11sp components? I understand that the 11sp chain is narrower and that the ramps on the 11sp rings are optimized for it, but will the 10sp Red rings work reasonably well?

[kramnnim]

I've been using 10sp Shimano rings with 11sp Campy for...5,000 miles or so, no issues. I guess the shifting might not be as incredible as it could be, but that is probably due to the FD not being set right.

[oldpotatoe]

I have a 10sp SRAM S975 Quarq PM with Red rings. Anyone know how well this will work with DA 11sp components? I understand that the 11sp chain is narrower and that the ramps on the 11sp rings are optimized for it, but will the 10sp Red rings work reasonably well?

Not well at all. Like electronic and positional shifters, front CR spacing must be correct. Campagolo Ultrashift much more forgiving, power shift not so much.

[kgreene10]

Not well at all. Like electronic and positional shifters, front CR spacing must be correct. Campagolo Ultrashift much more forgiving, power shift not so much.

Oh, that's terrible news. Are there are chainrings I can put on the S975 that will work? I would hate to have to buy a whole new power meter.