Installed four AH11 19.5s on rear 9 months ago and no problems on 10k miles so far. All the original G670 Goodyears had bad rivering 'wear'.
The AH11 seemed to have much more sidewall flex than the Goodyears. i.e. it felt like the rear was sliding out whenever turning the steering wheel. I hadn't driven the RV for a months before installing the AH11's so it might be just faulty memory.
If time permits, take a test drive just before and after installing the new tires to see if I imagined this.
One other note because I couldn't find definitive info before purchase: the AH11 19.5s I got were made in China.