Sure, if you can quantify the maximum tire diameter at max rpm and top gear, you should be able to compute the maximum possible speed. I don't personally know

Sure, if you can quantify the maximum tire diameter at max rpm and top gear, you should be able to compute the maximum possible speed. I don't personally know how much those tires deform at such speeds. My personal experience with sportbikes approaching 200mph has been it's not even enough to make up for the ~5% speedometer error that still indicated higher than actual around 190. But that's a much narrower and lighter tire, and 300mph is a different world.