Re-greasing BB bearings is vital to the life of your BB, especially when riding in wet environments or after hosing your bike off

Start by removing the cranks from the BB

The BB does not need to be removed from the bike to do this service, but it is a good idea to remove and re-grease the BB threads at the same time

Remove the outer dust seal

Dust seals on older BBs should come off easily

New BB dust seals have an inner sleeve that helps protect the bearing

These can be easily identified as the spindle sits on a portion of the plastic dust shield rather than directly on the metal inner bearing race

To remove the dust seal, gently slide a small flat blade screwdriver under the dust seal

Slowly work your way around the BB lightly prying up the dust seal

Repeat this until the dust seal is free from the bearing

Be careful not to pry to hard in one place as this can crack the seal

The cartridge bearing should now be exposed

Remove the seal on the cartridge bearing by sliding a thin sharp tool such as a razor knife under the outer diameter of the bearing seal and lightly prying

Be careful not to bend the seal while removing it

With the cartridge bearing seal removed, clean the bearing throughly

Repack the bearing with a high quality grease

Be sure to pack grease into the bearing, then turn the bearing to help the grease penetrate into the race and balls