Niner Biocentric I eccentric bottom bracket adapter won't budge Niner Biocentric is the asymmetric bottom bracket adapter for a single speed. Below is the II. I have the I. I could not find a picture of the I.  moves a little and the other no movement. Any ideas on how to get it to free up? Big hammer is not an option. It used to move OK but it was squeaking a bit so I torqed it to spec and it froze up. I am thinking about taking it apart but right now I cannot get my Raceface Evolve crank off.

I ended up taking it apart, clean, polish with 600 sandpaper, and grease. Got it to move / rotate.

It was very dirty as I used that bike to explore the city during a flood.

If you have this setup I recommend you tear it down and clean every couple years and after submerging in muddy water.

Comment from Nathan is valid if it is totally frozen. But I would recommend a separate longer bolt.

Got the slack out of the chain:
![Got the slack out of the chain](