Originally Posted by
jungleexplorer
I thought that is what it is called but in the picture you posted, that name is not found. I think it is calling it the "Crankset" in the picture. But, what I need to know is how to know what to buy to replace it with. I have looked and looked for a parts manual for my bike and they don't exist. I find sites with bottom brackets, but I how do I know which one will fit my bike?
Yes, that particular picture didn't include "bottom bracket", which is one reason I gave it to you straight on.
But there are plenty of glossaries available, and I only used the first one that came up on my search.
FWIW - "crankset" refers to the assembly, including both cranks and the chainring, that turns in the bottom bracket.
As for what kind of bottom bracket you deed, that depends both on your frame, and the cranks you're using.
If you post more detailed info about your bike, maybe including a photo people will be able to give you a more specific answer.