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BB is a common acronym for a Bottom Bracket.
Task Summary
WORKSHOP TIP: A major advantage of these units is that they are much easier to remove than cartridge units if corrosion has seized them in.
Removing a BB unit is a common workshop job. You will often need to inspect a unit to see if it needs a clean/refurbishment or simply a straightforward replacement. To remove any BB unit you will first need to remove the cranks.
Shown here on the slideshow is the removal of a BB on an old, cotterpin bike.
WORKSHOP TIP: When installing this type of BB it is important that you insert the fixed cup (drive-side) first in order to able to really tighten it down well.
Tools
