There is definitely a trim position for the inner ring on Sora 8 speed triple shifters. I honestly haven't played around with them enough to know if there are more trim positions only because a. I no longer use them on any of my bikes and b. on my wife's bike with Sora shifters, the middle and big ring can use all cogs without trimming. Maybe tonight I'll put it on the stand and confirm the lack of middle and big trim positions. FWIW, my Ultegra 9 speed triple shifters don't have a big ring trim position either.