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I show how to replace bearings in retainer cages with loose ball bearings. Bearings in cages are easier to install. But loose bearings have an advantage in that you have more bearings to distribute impacts. Cages also restrict movement of the bearings so that repeated impacts will be focused in the same spots. Loose ball bearings will move more freely and distribute impacts. This helps to minimize damage to the headset/crown race from brinelling.

Some of the tools used:
Dualco Grease Gun with Short Nozzle:
http://www.amazon.com/exec/obidos/ASIN/B0025UGOVW/ref=nosim/rjthebikeguy-20

Park Tool Spoke, Bearing, and Cotter Gauge – SBC-1:
http://www.amazon.com/exec/obidos/ASIN/B000OZBK82/ref=nosim/rjthebikeguy-20