Originally Posted by
DerpDerp
..I tried practicing some skids and trackstands on my fixed gear..., I noticed my crank arms were budging much more than they normally do when the chain's being pulled tight from a acertain crankset position... to my surprise I was able to push my crank arms independently of the chain ring... I'm using Origin 8 Propulsion cranks.
If yours are like
these, I find it hard to see how that can happen. The spindle that carry the chain ring is cast in one piece with the right crank arm.
The
left arm may wiggle a bit
independently from the right, which usually means a rounded out square taper and that a replacement is due. You can try tightening the crank bolts up properly first. If you've caught the wiggle early enough this may fix it. But don't hold your breath.
Pretty much the only option for what you seem to be describing is if your chainring bolts (the bolts that hold the chain ring to the arms of the right crank) are all about to come off/are seriously messed up. Should be easy enough to check.