Hmmm; for me, I don't like it. The lettering is too fancy of a font style. As a result, it looks more like the number "4" (when turned sideways). Since the wheel hub rotates, it will never be perfectly level to depict the desired "VX".
Further; it's hard to tell which way is actually UP, because of the too fancy font lettering style. From the typical pedestrian walking by your truck and looking at it, then it could mean just about anything depending on how it's positioned (rotated) at the time.
I guess you could put an "underline" underneath it similiar to the #6 and #9 billiard balls in the game of pool, to help the viewer know which way is actually UP. As it is currently depicted, it looks more like a fancy number "4".
My Dad once told me long ago-- "Son; never ask the question, that you don't want to hear the answer to." Sorry; no offense, but you asked. As Homer Simpson would say-- "Doh!!!"