I see the thread has went all over but the man/woman asked about running 3/8 standard on a 026. No matter what some believe the 026 will run it with a standard small spline rim and not some freaking arse Stihl mini thing. I have a half dozen of them. I run run 20" 3/8 72DL on the 026 and so does my former father in law that fuels a OWB just like mine