Genuine bearings are expensive and the diy home traditional mechanics recommendation are not recommended because you can wreck the bearing.
You must remove the bearing via bearing removal tool that are expensive.
1. Bearing removal with expanding feet at P440.00 in San Pedro Laguna at Laz
2. Pressfit tool with removal seet for 30 and 24 BB costing about P1,400.
3. Pure press fit with various drifts: P1,200 at Lazada.
It is OK to buy this if you have a bike shop and /or bike mechanic. But for a DIY who encounters problems with bearing once or twice every two years, a rubber mallet, drifts (from socket tools) a flat screwdriver may do the job.
DIY removal:
1. Remove the scewer;
2. Remove the cones
3. For hubs, remove the axle then tap tap the screwdriver from the inside. Do the same for other
bearings
4. For the free hub, push the bushing to other side to access the one side of the bearing. Tap the bearing at four corners. Tap tap lightly. Do the same for the opposite bearing Note for the
rear hub there are 4 bearings: 2 for the main hub, and 2 for the free hub (where you attach the
cog.)
While at it, remove the grime and stuck grease at the pawls. Degrease. Remove rust from
round spring as the case maybe. Relube: light grease and oil (even Shimano mineral oil)
DIY reinstallation
1. For front hub, tap tap one side. Then install the axle. Use a drift: a piece of tube or socket
of same same size: 22 mm to drive the bearing in. Tap tap slowly. Make sure the bearing
does not tilt
2. For the rear hub, tap tap one bearing. For the other side, insert the hub, then the bearing then tap tap.
Bearing sizes:
6000, 6002, 6802, 6902. There may be other sizes. Find out from old bearings the numer
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