Problem with chain adjustment

[His Dudeness]

Don't see how it has anything to do with suspension movement. It's fixed to the swing arm and goes through the caliper bracket which is around the axle which is fixed. There's no movement in the torque arm other than when you're moving the wheel to adjust the chain. It has to be able to pivot at one end a little because it forms a triangle and the angles change as the wheel is adjusted back and the triangle flattens. You don't really notice it until you put a new chain on and it has to move a lot in one go. I'm blaming Pythagoras for all this :lol