The bike bottom bracket is one of the most important piece of part in any bike and it is the part that connects the crank arm to the frame of the bike. Different types of bottom brackets can have different sizes, but the important thing is to understand how the bottom bracket works and how it can be removed without any tool.
Removing a bottom bracket is a fairly straightforward process, but unfortunately, there’s no such thing as a “standard” bottom bracket. There are lots of different kinds that use different tools, so you’ll need to be familiar with whatever type of bottom bracket your bike has.
The most common types of bottom bracket are Shimano (made for use with a Shimano tool), Octalink (made for use with an Octalink tool), and ISIS (made for use with an ISIS tool). Unfortunately, there are no “universal” tools for these types, so you’ll need to buy the correct one for your bike.
What is a Bottom Bracket Tool?
The tool you need to remove a bottom bracket is a bottom bracket tool. This is a special, cone-shaped tool that fits over the lockring and is used to loosen it (or tighten it) so you can remove the crank and bottom bracket assembly.
There are two types of bottom bracket tool: external and internal. The external tool is, by far, the more common of the two. It fits in from the outside of the lockring and is operated by hand.
A bottom bracket tool is a small device that is used to remove the bottom bracket in order to replace it with a new one. The bottom bracket is the point where the crankset of a bicycle meets the bicycle frame.
This is where you will find the bearings and seals that allow the crankset to rotate freely. The bottom bracket tool is a small tool that is inserted into a small hole in the bottom bracket. By turning the tool in the hole, the bottom bracket can be removed from the frame for repair or replacement.
How To Change A Shimano Bottom Bracket?
There are two common types of bottom bracket on modem bikes. One is the press fit and the other one is threaded, which is exactly what we’ve got on this bike here, And in this article, we’re going to show you how to remove and then replace a threaded bottom bracket.
The only thing that you need for this job is a tool which correctly fits onto the bottom bracket cups and also, if you want to do it properly, a torque wrench. But of course you’re also going to need the correct tools with which to remove the crank set in order to get to the bottom bracket in the first place.
1. Remove Your Crankset
To remove our Shimano or Tiger cranks, Firstly, needed to undo the 2 5 millimeter crank bolts, then remove the threaded end cap on the crankset using a Shimano tool. Finally, push the pin away on the locator hole.
You can then pull the non-drive side crank away from the frame. Next, push the axle of the drive side through the bottom bracket, then coming around to the other side of the bike. Remove the chain from the chainring, pull the crankset away from the frame.
2. Remove Your Bottom Bracket cups
You’ll now need the special bottom bracket tool that fits the outer circumference of the bearing cups. Place the tool on the cups and hold it tight and straight to loosen the cups in the frame.
Generally, you push clockwise on the right-hand side and anticlockwise on the left. Many bottom brackets have directional arrows on them. You might need to push hard to get the cups moving initially. After that, they’ll simply unscrew do the same on the other.
3. Clean and Grease your Threads
side, and once you’ve removed the bottom bracket, give the frame frames a quick clean out and then smear with light grease before refitting. Refitting is simply the reverse process. There were any spaces behind the bottom bracket cups as you took it off. Make sure you put them back in the same place before you put it back on.
4. Replace Your Bottom Cups
You can start spreading and tightening the bottom bracket cups by hand, but then you’ll need to use the special tool and the tool French N on our particular bottom bracket.
They recommend the torque of 34 net meters. Once it’s tightened, you’re ready to put your crank set back on.
5. Replace Your Crankset
Wrap the chain around the bottom bracket shell, then push the drive side axle through the bottom bracket. Push the non-drive side crank onto the axle perpendicular to the drive side crank. Push the safety pin back into the locator hole. Put the threaded end-capping on the non-drive side crankset.
Finally, tighten the 2 5 millimeter bolts up on the crank. In this instance, the recommended Tor is 12 to 14 net meters.
Related: How to Remove Crank Without Puller
Frequently Asked Questions
As someone who has worked with bikes for a long time, I can guarantee you have a number of tools in your cycling toolbox. If you are a DIY or home mechanic, then you will need a lot more than the average rider.
Having the right tools is a big part of the job and having the wrong ones can cause problems. No one is going to say having the correct tool for the job is not important.
There is no single tool you can use for every job. Depending on the task, you will need a variety of tools in your toolbox. One of the first things most riders need is the ability to remove the bottom bracket.
If you have a bike with a bottom bracket that you want to remove, then you’ve probably already discovered that it’s not always as easy as it sounds. This incredibly common operation often stumps the best mechanics, so let’s take a look at why it can be so frustrating and offer up some advice that might make the process easier.
I’m going to be completely honest with you: I don’t grease my press-fit bottom brackets. I haven’t done it since I was 13 years old. I bought my first road bike, and I didn’t know much about bicycles at all.
But I did know that most road bikes have press-fit bottom brackets, which means they don’t use threaded bottom brackets, so I assumed that meant I didn’t have to grease the press-fit bottom bracket. I assumed wrong.
The secret to removing a locking bottom bracket is to use the right tools, and follow the manufacturer’s instructions. If you are not sure how to do that, you might try talking to your local bike shop owner or mechanic.
How does a crank puller work?
The crank puller is a bike tool that is used to remove and replace cranks, which are the arms attached to the pedals that connect to the pedals and the bottom bracket. Cranks are held in place by the bottom bracket, which is a circular piece mounted to the frame.
The crank puller is used when a crank is so damaged that it does not pull out of the bottom bracket and only when the crank puller can be used.