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Properly pack/adjust bicycle hub bearings

Step 5Reassembly

If you are going the "loose-ball" route, pack some grease into the bearing cup and use that to hold each ball in place during reassembly. Be sure to use enough grease in this step.....better too much than too little at this point.

For those making the conversion and not sure of how many extra balls to add, just add enough to fit about in the wear line. One too many will demonstrate itself as too full to reassemble properly, so in such case, take one out. The bearings should fit in the same space as the caged version did, and one too many will be clearly evident. Use the same number of bearings for both sides, usually only adding 2, maybe 3 more will suffice. 7 balls caged usually equals 9 balls loose on a full-sized axle. Only fill a gap larger than 110% the diameter of a new ball. A little space between loose balls is acceptable.

Again, it is better to put too much grease than not enough at this point. I recommend using "high-temp disc-brake bearing grease" (automotive grade black lithium base) since these are low-speed high-load bearings per typical lube specifications. The thicker the grease, the better at this point, and water repellance is a nominal and desired property, regardless of bearing configuration.

A cone wrench is strongly recommended at this point to ease assembly and preloading.
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Author:Prometheus
jack-of-all-trades hobbyist/inventor/fabricator Specialties in automotive. cycling, power-transmission (electrical and mechanical), old-school fabrication/tooling.