- 1 Can you remove bottom bracket without tool?
- 2 What tools do I need to change a bottom bracket?
- 3 How do I know if my bottom bracket is going bad?
- 4 How do you use a bottom bracket removal tool?
- 5 How many miles should a bottom bracket be?
- 6 Is it easy to change bottom bracket?
- 7 What tools do you need to take apart a bike?
- 8 Are bottom brackets reverse threaded?
Almost anything can be taken apart without proper tools, including bottom brackets. it, but it can be done. The right tool for the job(any job) makes life much easier and will lower your frustration level by leaps and bounds. If it is a Square taper, isis or octalink then no.
Bottom Bracket Removal Tool
- Crank extractor (Also referred to as crank puller) – This is necessary for most systems but some have a one-key release or self-extracting system.
- Bottom bracket removal tool.
- Allen key – ideally long length.
How do I know if my bottom bracket bearings are bad? Spin the crank while holding the bike with one hand. If you feel an obvious rumbling or grinding feeling, the bearing are wore out and the unit should be replaced. Very worn bottom brackets will actually make a grinding noise.
Insert the tool fully and remove the non-drive (left-side) cup by turning counterclockwise, holding the tool firmly to the cup. Remove any internal sleeve. Take note of any spacers under the cup for reassembly. Next remove the drive (right-side) cup, turning clockwise to remove.
As for a bottom bracket, on the low end, maybe 5000 miles. The basic Shimano one most people use (UN51/55/similar) can reasonably expect 10k+ miles. But sometimes you get unlucky and get a bottom bracket that lasts maybe 500 miles.
Fit the new bearings The new bottom bracket should come with a plastic sleeve. Using the bottom bracket spanner, tighten first the right bearing then the left bearing to 35-50Nm (if you don’t have a torque wrench, this is ‘pretty darn tight’). It’s quite easy to cross thread the BB here, which is a costly mistake.
What tools do you need to take apart a bike?
Again, the following list is a good starting point for your drivetrain-tool arsenal.
- Screwdrivers (multiple sizes of flat-head and Phillips)
- Allen wrench set (ranging from 2-12mm in size)
- Torx wrench set (T25 being the most important)
- Needle-nose pliers.
- Cable cutters.
- Dental pick.
- Chain pin removal tool.
- Chain pliers.
BSA bottom brackets are reverse threaded on the driveside to counteract this.