You know, I'm just running some basic math. Realistically, if that wheel spins at 7200RPM, then I'm not sure how it's generating a 144hz image because the wheel would be spinning faster than 1/144th of a second every full rotation. The wheel is spinning 120 times a second at 7200RPM. If it were showing an image at 120hz, then it would be a 1x color wheel, but probably called a 2x because of the extra segments.
Since the manufacturer doesn't really list the color wheel speed, I'm really not quite sure how they are doing things. But, my expectation is that the color wheel speed is slow, and 3x/4x speeds are generally what I consider slow. I know I can see rainbows on my BenQ W1070 fairly easily. I can't believe in the last 5+ years that color wheel speeds haven't jumped to 12x and 18x as a standard for DLP.