How to Change a Press Fit Bottom Bracket
The bottom bracket is a crucial component of a bicycle, providing the interface between the crankset and the frame. In recent years, press fit bottom brackets have gained popularity due to their lightweight design and ease of installation. However, changing a press fit bottom bracket can be a challenging task if you’re not familiar with the process. In this article, we’ll guide you through the steps to change a press fit bottom bracket, ensuring a smooth and successful installation.
1. Gather the Necessary Tools and Materials
Before you begin, make sure you have all the necessary tools and materials. You’ll need the following:
– Bottom bracket tool (specifically designed for your bottom bracket type)
– Grease
– Bottom bracket cups (if applicable)
– Chainring bolts (if changing the chainring)
– New bottom bracket (if necessary)
2. Remove the Old Bottom Bracket
To remove the old bottom bracket, you’ll need to remove the cranks. If your cranks are not threaded, you can simply unscrew them. If they are threaded, you may need to use a crank removal tool.
Once the cranks are removed, you can now access the bottom bracket. Depending on the type of bottom bracket you have, you may need to use a bottom bracket tool to remove it. In the case of a press fit bottom bracket, you’ll likely need to use a press or a bottom bracket press tool to remove the cups.
3. Clean and Inspect the Bottom Bracket Area
After removing the old bottom bracket, take the time to clean and inspect the bottom bracket area. This will help you identify any potential issues and ensure a proper fit for the new bottom bracket.
If you notice any rust or damage to the frame or bottom bracket shell, address these issues before installing the new bottom bracket. Clean the area with a wire brush or sandpaper and apply a rust inhibitor if necessary.
4. Install the New Bottom Bracket
Now it’s time to install the new bottom bracket. Begin by applying grease to the bottom bracket cups and the threads of the bottom bracket shell. This will help prevent rust and ensure a secure fit.
If your bottom bracket requires cups, place them into the bottom bracket shell. If you’re using a press fit bottom bracket, you can now press the cups into place using a press or bottom bracket press tool. Be sure to follow the manufacturer’s instructions for proper installation.
5. Reinstall the Cranks
Once the bottom bracket is installed, you can now reinstall the cranks. If your cranks are threaded, simply screw them back into place. If they are not threaded, use the appropriate crank removal tool to secure them in position.
6. Check the Fit and Adjustment
After reinstalling the cranks, check the fit and adjustment of the bottom bracket. Ensure that the cranks are parallel to each other and that there is no play in the bottom bracket. If everything looks good, you’ve successfully changed your press fit bottom bracket.
Remember to periodically check the bottom bracket for any signs of wear or looseness. This will help ensure the longevity and performance of your bicycle.
By following these steps, you can confidently change a press fit bottom bracket and keep your bicycle running smoothly. Happy riding!
