I finally upgraded my old 3x gearing last year to SLX 1x12 and a Sunrace casette. A couple of friends have gone this route and are extremely happy with it. I'm however not impressed. Gear changes aren't smooth and very clunky, and recently it developed another issue, which I haven't seen on the hub yet. When gearing down the bottom jockey wheel (if that's what you call it) doesn't move back to keep the chain tight, so the chain starts to hang. If I push it forward and let go it snaps back to hold the chain tight, but I have to do this every time I've gone up a few gears and then down again. I took it back to my LBS, at very short notice and not a lot of time for them to work on it. So kudos to them for still helping me out. He said they cleaned it out and correctly torqued something. Upon collection I went for a short ride, gearing felt a little better and derailleur seemed fine. Very next day I take my bike out and chain is sagging again, even worse than before. I'm a 3 hour drive away from my LBS so can't quickly take it back and leave it there to have them sort it out. Has anyone experienced this before and have some advice on what I can do to solve this?
