What sort of BB is this?

[sleuthey]

I need to remove the crank. Iv removed a dozen or so BBs / cranks in the past but they have all been square taper and removable with a crank puller.

What type do I have here? I can then look up YouTube videos etc. for the procedure and tools. Thanks.

 

[cyberknight]

is that octalink ?

 

[sleuthey]

is that octalink ?

It is indeed. Many thanks.

YouTube video sought, method id never had thought of, thought I was going to snap my hex key, but off it came!

View: https://youtu.be/wUyOUgnfQQU

 

[Cycleops]

Be aware that when you put it back you need to tighten it to a high torque otherwise it may loosen eventually destroying the crank arm. Octalink has now been discontinued for this reason.

 

[sleuthey]

Be aware that when you put it back you need to tighten it to a high torque otherwise it may loosen eventually destroying the crank arm. Octalink has now been discontinued for this reason.

I doubt those rubber washers under the nut help.

 

[Ajax Bay]

Under what nut?
There are no nuts involved sfaics.