Originally Posted by
Jarrett2
A friend of mine had one installed (unknown to her) by a LBS to accommodate a larger cassette on her 1x setup. It started dropping chains immediately.
I replaced her DR and that thing with a SRAM Apex1 DR and all good since.
This goes back to improper rear derailleur setup (usually b-tension) and establishing correct chainline at the front ring - no more complicated than that. If you hack together a 1X on a bike that was previously running a 2x, then getting the adjustment right is like an art, and no bike shop is going to get it perfect just by a quick tinker. I've been running the wolftooth stuff for ages and never had an issue once it was adjusted correctly.