You bought takeoffs from me at round 5. You claimed didn't have any money on you then, you said you were good for it. Round 6, still didn't pay me. Round 7, nowhere to be found. A bunch of excuses and broken promises to pay, still haven't paid me (um, it is the end of November now). Any effort on your part to make good on your word? Nope, none.

Keep the $50, the money isn't the point anymore. When you can't keep your word to a fellow racer who helps you out and you stiff them for tires (for a lousy $50 bucks too), you are what you are.