Originally Posted by
Branko D
Losses from crosschaining in a 2x11 setup is under 0.8W loss (running 53-28 versus closest gears in the 39 ring, 250W output, 95 rpm, tested by friction facts).
In a 1x system it is necessarily less than the worst case of a 2x setup... basically not a significant factor. With a triple extreme gear combinations are more of an issue.
Cross chaining in 2x will create a worse case compared to 1x, but not cross chaining in 2x will create a better case compared to 1x. <--that last part seems to often be ignored/missed when drivetrain efficiency for 1x is discussed.
Either way though, I am for sure losing more watts due to my dirty chain than either the theoretical 1x or 2x inefficiencies.