Where are my barrel adjusters for my shifting cables? I have a Devinci Caribou I and I was trying to adjust the front derailleur. I got the top and bottom stops adjusted right, but it seems that it doesn't downshift correctly from the biggest cog to the intermediate cog.  From reading on the internet, I've seen recommendations to adjust the barrel adjustment to fine tune the derailer. Only problem is I can't find the barrel adjustment.  The shifter cables come right out the side of the brifters, and there's no adjustment there. They go through the frame, and come out near the bottom bracket.  On the cable housing there's something that can be turned that seems like it could be a barrel adjuster, but turning it creates no changes in derailleur position.  This turnable part of the cable housing is present on both shifter cable. There is functioning barrel adjuster for my rear brakes, but this is quite different then the possible barrel adjustment for the shifter cables (and it actually works).  Can anybody help me out finding my barrel adjuster?  Here is a picture of the model that I have, although it's hard to see any of the cabling in this picture.
Looks like there's an adjuster in-line, right before the cable enters the down tube.