Seems to me that half the fun of a tire swing was the ability to rotate it while swinging. Then again the safety police might balk at that so dont forget to install the 6 point safety harness and all the foam underneath to break the falls. With all the lack of safety features that we grew up with, how the heck did we survive? I think it was some luck, but we learned a lot about how not to do things wrong but once, if you survived that, then lifes lesson was learned early. Now days adults have to anticipate every event that could possibly go wrong and stop if from happening, it is the way of our society. If by chance a child falls from a swing set, it must be the fault of the manufacturer for not designing it correctly so we must sue them because our child cried when he fell. Some knocks and falls are good for development as long as they arent permanently damaged. I guess us old folks were luckier than todays kids. I still dont have any broken bones after 61 years and a lot of falls from swings, tree tops, monkey bars and lots of rope swings over shallow water and plenty more dangerous stuff that I dont want to admit that happened that I wouldn't want my grandkids trying for sure.