I know right?Have to say. I wasn’t expecting anything dramatic but it truly is a huge difference in traction. We ended up with about 5 inches of slick slushy snow today and the tractor didn’t spin hardly at all. Where before I could not really plow uphill it just seemed to dig in and go. And it’s slick. My wife’s grand Cherokee barely made it up the driveway and it’s a tank. Grooving your tires is definitely worth it.