Threaded bottom brackets

The main advantage of threaded bottom brackets is their reliability and easy assembly. They use threaded cups that screw into the frame and provide a secure and stable connection. This design facilitates the maintenance of the bottom bracket, as well as its replacement when necessary. Additionally, threaded bottom brackets are less prone to creaking and loosening compared to other types such as Press Fit bottom brackets. There are several types of threaded bottom brackets available on the market, each with their own specifications and compatibility. Here are some of the most common thread types:

BSA (English/ISO) : It is the most used type of bottom brackets. It has a standard 34.8 mm x 24 TPI (threads per inch) thread and is compatible with most modern road and mountain bikes. BSA Threaded bottom brackets are available in a variety of lengths to accommodate a variety of cranksets and frame designs.
Italian: Italian threaded bottom brackets have a standard 36 mm x 24 TPI thread. They are used primarily in Italian-made frames and are less widespread compared to the BSA type. They require specific tools for installation and removal.
French: French threaded bottom brackets have a standard 35 mm x 25.4 TPI thread. They were commonly used in older French-made bikes, but are less common these days. Finding replacement French bottom brackets formations can be challenging due to their limited availability.

Make sure the bottom bracket matches the thread standard of your frame and the cranks you want to use.

Check out our video Threaded bottom bracket replacement