Cruiser RV axles.. Could my axle be one of the problem ones?

If you have thin axles, there could be an issue, it would look about an inch in diameter. The axle tends to bend and/or be out of alignment and you get premature tire wear. If the axles look 2.5-3 inches think then you have larger ones which seem to have fewer problems but that does not mean there could not be issues. If you think you are having an issue, keep an eye on it and get it looked at. Good luck.