NEVER heard of a wear bar problem. Never heard of the term Wear Bar. Since they mention roller in place of a wear bar, I assume they mean the NYLON SLIDE bars that a lot of slide rooms slide on. Yes, they can be damaged or inadequately installed and they break loose. All the Accuslide system does is pull the room out and pull the room in. The underneath on the main floor supports the room whether it is rollers or the Nylon. I doubt you can just install rollers in place of the Nylon. There is a BIG difference in height(rollers higher). Ask the shop if they have done this type repair before(installing rollers). Odds are the rollers will have to have a recess cut out of the floor to get them low enough to work. 2016, I would be trying to get Keystone involved, unless you are not the original owner. Doug