To install a bottom bracket

Begin with thread preparation. New cups may come with dry threadlocker already applied. Install these as they come. This creates a durable barrier in the threaded joint and prevents corrosion. The liquid compound will provide lubrication when tightening before drying and hardening to seal and keep the cup in securely.

Install any spacers as required on the right-side cup. Thread right side counterclockwise into the shell. Typically this is between 25 to 30Nm. Trade Resources. Both sides forward! You have to go forward in order to make some progress! So naturally the opposite goes for installing a square taper bottom bracket: both sides have to go backwards! Bottom brackets are notorious bicycle parts know for seizing into your frame.

The most common examples of galvanic corrosion of aluminum alloys are when they are joined to steel or copper and exposed to a wet saline environment. As said before, installing the bottom bracket is achieved by rotating both cups backwards. You start with the drive side first. I use a Parktool BBT bottom bracket tool which fits into the splines of the bottom bracket. I use an adjustable wrench to tighten it.

Next up is the non-drive side. The non-drive side cup does not have a flange so it can always go in as far as it should to tighten against the bottom bracket. Since frame sizes are standardized in this case 68mm. If you like this article give it a thumbs up. If you have any questions or suggestions for new articles, let me know in the comments below.

If you like this article please share it. If you have any questions or suggestions for new articles, let me know in the Facebook Group. For as long as the brakes. The chrome on the steel fork of my Koga Miyata Skyrunner has rust. It can removed similar to a press fit bottom bracket cup. After removing the drive-side cup, use a remover such as the Park Tool RT-1 and drive out the left side, similar to removing a press fit bottom bracket. An alternative removal process is to use the drive-side cup as a remover.

After removing the drive side, reinstall it engaging it by installing 3 full turns. Use a block of wood over the drive side and strike it squarely to free the non-drive side. Preparation of the threads and pressed surfaces is an important part of the installation process.

This provides lubrication for the threads as it pulls tight, then dries to harden and expand. Use a bottom bracket press such as the BBP Substitute a headset press or similar tool if a bottom bracket press is not available. Fully tighten the second cup to the recommended torque, typically 30Nm.

If there are narrow wrench flats on the component, use care not to let the wrench slip.