Michelin vs Falken

I have had only 16'' Michelin M/S tires put on the entire time I've owned the camper since 2003. Some cracked very soon. That was almost ten years ago. Funny thing..... the ones I've had the longest now, are uncovered, sitting outside, two are almost nine years old and have absolutely no cracks at all. I just got back from a long run with no problems, but those two are getting replaced with Michelin again. I'm not sure about the softer sidewalls, but a stiff sidewall means they run hotter isn't that correct? I trust my michelins and only buy the most expensive ones they have.

I also run on Alcoa forged wheels. Cast wheels are the typical thing you see running around everywhere and have a weight rating far less than forged wheels.