Just bought a 2006 sportsman 800, mostly to work around home as I never seem to have time for fun. I’ve changed all the fluids, spark plugs and fuel filte so I have a benchmark as to when they have been done. Does anyone suggest anything else. Also I noticed I have a cracked sidewall on one if my tires that is leaking so I’ll need tires it has 26x8R12 front and 26x11R12 back. What other sizes could I use? I don’t need big tires just practical options. Doe the numbers represent height, width and rim?