Schwable Big Apple tire cracking

Has anyone experienced problems with sidewall cracking on Big Apple tires? Mine is only a few months old and has developed many cracks in the sidewalls as well as into the tread groves. There are some cracks near the bead that are around 10” long. I have been inflating with 55-60psi. I really like the performance tire but hesitate in using it for long trips with these cracks. I would buy another but don’t want to experience the same problem. Are there any other good alternatives?

Here’s the scoop from U-Turn:
Big apple cracking thread