It is a joke you probably don’t want to say in a corporate setting but I can’t see it as racist.
I got a simple rule of thumb in defining something as racist
if everything was the same except the color what would be the result...
if president of NFLPA was white and Gruden disagreed with him would he refer to his lips as tires...I dont think so and for me I consider a racist comment. but thats just my thoughts. This is racist cause its a call back to a racist troope and its not commonplace to call someone a liar by refering to the size of their lips.