I agree with 427sharpe, Cracks never get smaller with time. I would hate to see what would happen if that rim let go when you were getting on it and loaded that rim (like when you go thru a turn).
I wonder if the company would replace it free of charge. It is kinda hard to crack a rim in that area, which would lead me to believe it is a defect.
Don't get me wrong JB weld has its place but not on my rim at 120mph.
