i have a 2009 Cedar Creek 34sats that came with never-lube wheel bearings. Did the wobble check periodically as that's all that could be done without disassembly. Had one fail earlier this year. It caused the wheel to cock on the spindle which caused the tire to rub on the shock mount. Wife saw smoke in her review mirror. Stopped the trailer and had to put out a small fire in the bearing cavity. Ended up pulling the wheel and limping to a trailer shop 20 miles away on 3 wheels. The damage to the axle necessitated replacement. I had them install 2 7000# axles with standard hubs/bearings, etc. I'll NEVER own another trailer with never-lube bearings.