Not for a Stihl though. Again it,s 16, 18, 20, 24, 28, with the Windsor line. I think you'll be fine with the 24/25 Stihl or a 24" Windsor/Powermatch. That is unless you expect it to be a hotsaw or you are buried in hardwood all day long. I mean having teh bar buried. My 390 runs the 25" just fine.