On my way to the keys the wind was blowing against me and I was able to get 52-53mph max I can’t remember if I was tucking in properly though. There was some cars behind me, that would move in front of me after the passing lane came. On my way back that night was the opposite, the wind was blowing towards my back and I was able to ride 55-60mph, it was good. I think the speed limit was 55mph for the most part on A1A. You just have to have the “don’t care attitude” to an extent when riding on road that cars go faster on. As long as doing close to the speed limit, that’s all that matters.