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.
The bottom bracket spindle—it is a spindle and not an axle since it “spins” on the bearings—left and right side has a simple box-shaped or square end. This end is slightly tapered into a wedge shape, narrow at the end increasing in width.
The bottom bracket is the bearing system between the cranks. It sits inside the part of the frame called the bottom bracket shell. The bearings are held in the shell by an adaptor or a cup. The spindle connects the two cranks to one another and to the bearings.
If the bottom bracket was already used, it should spin reasonably well. Bottom brackets don’t have to just spin to a silly degree because it’s all about how they perform when loaded, not unloaded like in your spin test.
How do you loosen a bike crank?
How to remove your road bike’s crankset
- Loosen the left-hand crank bolts. First, use a 4mm Allen key to loosen up the hex bolts that hold the left-hand crank arm onto the crank spindle.
- Remove the adjustment cap.
- Remove the crankset.
- Clean up the bottom bracket.
- Put it all back together.
- Retighten the bolts.
Between $30 and $50 plus the cost of parts. Though some shops may do the install for free or for a reduced fee if you buy the parts from them.