I'm kinda partial to Amsoil synthetics and they have a variety of bearing grease as well! I did see less frequent maintenance on my open traler wheel bearings when I switched from conventional grease. I continue to use it on my enclosed trailer. I use the Series 2000 in everything - trailer bearings, car wheel bearings, ball joints, etc.

Amsoil bearing grease.

I also check the wheel bearing and brake adjustments on a regular basis. Good preventive maintenance.