Originally Posted by
K&K_Dad
zero loss is shift as soon as it moves. On the left shifter of SRAM(not sure of apex though) as soon as you start to push the lever the FD moves. With everything but red the rear has some 'play' before it engages. Zero Loss takes that out.
That sounds similar to their mountain bike line? I have X.7 shifters and an X.9 front derailleur on my mountain bike, works great.