What kington99 said, + they look like this:

[image: http://www.mtb-bearings.com/bearings%20023.jpg]

They are the bit that you clamp your frame onto in the middle of the
wheel.


--
jamessd

http://www.youtube.com/watch?v=BCsb3y-YOSk
Add me, but tel me who you are :


Kieron wrote:
I tell u wat they would have to be a very commited pedo to learn to ride
a unicycle in order to mingle with us, steel one of us and rape us in a
bush.
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