Shimano Dura Ace 9200 [speculation]

[Aeroiseverything]

For everyone willing to discuss power efficiency of drive trains and chain rings:

Drivetrain efficiency - does chainring size really matter?

Since the discussion of chainring sizes, and their efficiency has flooded other threads, I would like this thread to become the place to discuss this. The origin of discussion accrues from the smaller chainring sizes and the 10t cog of current gen SRAM drivetrains, vs Campa and Shimano maintaining a 53/39 and 11t cassette for the 12x generation. A few links on this discussion: From what I see here, the difference of a 50/37 vs a 53/39 with similar chain line should be measurable, but very lo…