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I recently did some research on wheel bearing grease. Seems the Chinese Bullet Train was experiencing some bearing issues due to the high speeds of operation. They did a test of 30 top of the line bearing greases from around the world and found the Royal Purple High performance synthetic grease to be better than anything else. They lubed up their test train with the Royal Purple grease that had just topped out in their evaluations. The test train was then pushed to set a new speed record with no bearing problems.
I cleaned and repacked my front wheel bearings with the Royal Purple high performance wheel bearing grease and checked temperatures with an infrared thermometer for about a month. I found braking caused some major differences in wheel bearing temperatures. Around town, I always had high temperatures around town compared to my road trips. One road trip with almost no braking for 50 miles had the most even temperature from side to side. The variance in temperature was only 3 degrees that trip.
Even with the best grease, the standard bearings of today are just enough to get by. Do some research on ceramic bearings which are just beginning to make inroads into the automotive world. They are found in racing bicycles and motorcycles with great results. Ceramic bearings are part of our future and will save energy!
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