Shifty is a small but extremely effective little device for your SRAM 1×11 or 1×12 rear derailleur. Particularly when riding in wet and muddy conditions, we found out, that SRAM rear derailleurs lack shifting accuracy, due to the fact that the original pulley rotates with its plastic body on a steel axle. The pulley experiences extensive friction, when dirt, water or mud come into play and causes lack of precision or even \”ghost-shifting\