RV'ers with No Goodyear G670 Problems

My Holiday Rambler came with G670's. At 7000 miles the front showed signs of rivering. Called Goodyear and they said they didn't know anything about rivering (I guess they don't read this forum), but said to rotate to the rear and get an alignment. I did all of this and now at 43000 mi. the front and the outside rears rivered so bad that it wore thru the outside tire rib that the steering wheel started to shimmy. Called Goodyear again and they promised to have the district rep. come and look at them, which they never did. Replaced them with Michelin XZA3+ and am very pleased after 6 months. Would not have G670's again, not saying they don't make good car tires but their customer service and standing behind their product is poor. If you have any doubts about this just do a search on this forum and IRV2 as well.
JMHO; KDK