I have an older Jayco popup camper and I put new rims/tires on it this summer and after installing those, somehow I lost 3 of the 4 lug bolts the first time we took it somewhere and I saw the rim wobbling on the hub. Bought 4 new lug bolts, re-torqued them and they still come loose. Is it time to replace the entire hub/bearing assemblies? Its a 1997 popup that we use maybe 5-8 times a year. Also, if I am replacing the hub....anyone know if I can go from a 205/65/10 wheel/tire setup to a 12" rim w/ radial tire setup? I am not a fan of bias ply tires.