Gearing isn’t necessary… a clutch kit isn’t strictly necessary either, just highly recommended. One of my friends ran his Xpedition for about a year with HCR and 35” tires with the stock ECU tune and clutch. He never had to change the belt in that time, even with pulling a camp trailer, and running it on the dunes. Granted, this was on a ‘24 Xpedition, before the “comfort clutch” so I don’t know if Polaris changed the clutch spring rates along with the clutch weights. I don’t think they did though.