I posted this question on the turbo forum but have only had 57 views so I thought I would ask here as well. I have a 240 Pirelli Z & W rated which is good for sustained 168 mph so the tire can handle over 200 mph for a short time. There have been some question as to whether the 240 tire on an RC Components rear rim will grow at that speed to the point where it might start loosening on the wheel causing loss of control which I obviously wouldn't like. I have gone 185 on gps without issue but 200 and over is another thing.