This saga continues without resolution.
My original XRV's went 10 years no cracking looked just fine in and out when I replaced with XRV's, of course. If they had developed cracks I would probably be running TOYOs now but they didn't so I'm sold. Car and truck run Michelins as well, no problems ever.
If I knew why, other than the fact that I care for my tires and keep them inflated properly, I would sure share the secret. Doesn't seem to be one.
I do all my own stunts
03 Dolphin LX 6355, Workhorse W22, 8.1 vortec, 04 CR-V, Blue Ox, Brake Pro----Norm, Barb and
Doc(He's a PhD)