The problem does indeed exist. Several people on the Grand Design forum have had several Vietnam Sailun tire, manufactured winter/early spring, this year, with tread separation. Not good news. There have been a few cases, but I've not read of any recently. But that could be because the traveling season is winding down. Personally we won't be traveling much until next year, and if it were me, I'd wait for a few months and see how things shake out. Just depends on how badly you need new tahrs.