As said I'd move the front to the tag position and have them checked out at that time inside while off the rim. In regards to the light weight mine also by the charts should have the minimum inflation by weight but the les scwab tire dealer ( who does a lot of motorhomes ) refused to go that low and I heard the same from another brand dealer,.90 was the lowest they would put in telling me the tag has extreme lateral force on it and low inflation would cause failure. Not sure if that's true but it made sense to me and I've run 90 since with no tire wear issues.