And they might. But, the reality is, Cat went plastic to sacrifice the undercarriage instead of the track. If you price undercarriage parts, obviously not a good move on their part. I would run without steels first and see what the wear is like. Since in our conditions both the undercarriage and tracks wear rapidly, we decided to beef at least one of them up. I was told by an ASV salesman that they are going to almost exclusively steel idlers on their machines but I don't know if that is a fact. As far as steel on rubber, like I informed Cat....what exactly is their CTL's?.....steel on rubber. I do know the difference on the tracks, one being steel braided the other nylon. But still....Cat spent way too many hours with their machines exercising on treadmills and not actually in where the rubber hits the dirt scenarios.