rmillay
Five Star Member
rbent member; go Clowns!
Posts: 2179
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The article suggests repacking the bearings, which is suggestive. When sealed bearings are ordered in bulk by a manufacturer, size, general quality, and lubricant may be specified, according to application (and, of course, as cheap as possible). General replacement bearings are lubricated according to their presumed usage. Bike bearings are low speed, low load bearings, but, possibly because we sometimes ride in the rain or the mud, are rated for severe use. Using light lubricant allows the lowest quality bearings to run freer. FWIW, I've never been able to re-lube sealed bearings without buggering up the seals, but YMMV. Garden variety grease is a mixture of a stiff paraffin and a light oil. It tends to separate with time, so use keeps it working. I favor synthetic greases, which are more uniform, and better suited to a specific function.
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