There were some instances where the 5-spoke Americans broke but I don't think there was an epidemic of this happening at that time. There was some natural movement for some to the 200-S American because it was new for the '69 season and it was a new, unique design. Tire sizes were growing a lot in this timeframe and there probably was some concern that the wheels would be under more stress. Since the Minilite wheels had more spokes, it is also natural to assume there was more inherent strength in that particular design. Off the top of my head, I can not remember seeing a picture of a broken Minilite but I can recall seeing some broken 5-spoke Americans. I think once Bud Moore saw that other teams were not having any issues with Minilites breaking, he followed suit later in the '69 season. Successful teams tend to follow what other successful teams are doing.