I think you will find that most of the tires are ( directional ) meaning they should only rotate one way, much like snow tires on a car. Rolling them the wrong way reduces the traction that they produce. I think you will find that they will wear fairly evenly in sets as the rear axle is solid. Maintenance is very easy once you get to know your machine and after a while you will become more comfortable doing your own maint and repairs. Saves a lot of money over time. You also learn how the machine works so when a problem comes up on the trail you potentially would know how to fix it or at least cobble up something to get you home. Good Luck.