- 1 Which way do you unscrew a bottom bracket?
- 2 Can you remove bottom bracket without tool?
- 3 What tools do I need to remove a bottom bracket?
- 4 Why does my bottom bracket click?
- 5 Is it easy to change bottom bracket?
- 6 How many miles should a bottom bracket be?
- 7 What tools do you need to take apart a bike?
- 8 Are bottom brackets interchangeable?
- 9 Are bottom brackets reverse threaded?
The common threading for bottom bracket shells is called “English.” The left-side cup is a right-hand thread direction, which tightens clockwise and removes counterclockwise. The right-side (drive-side) thread is a left-hand thread, which tightens counterclockwise and loosen clockwise.
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.
Most surprisingly, what often sounds like a bottom bracket creak is usually something else. Most of the time, the true cause is a loose chainring bolt. Tighten ’em up and that’ll quiet most creaks. After you check the chainring bolts, look at the pedals, crank bolts, seatpost and seat.
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.
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.
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.
Threaded bottom brackets shells have been made over time in various thread standards that are not interchangeable. The drive side (right side of the bike) uses a left hand thread, tightening counterclockwise. The shell inside diameter will be approximately 33.7mm.
BSA bottom brackets are reverse threaded on the driveside to counteract this.