Originally Posted by
SSRI
you might just need to re-torque the crank bolts to eliminate the wobble, I would not jump to a quick replacement until you know the diagnosis.
If you are going to change to a 9 or 10 speed crankset you might also need to change to a 9 or 10 speed chain since the spacing between the big and small front chain ring will be closer.
I'll set it aside as a backup, I've had an octalink on my MTB which looks basically like a sqr tapered and had the same problem after a few miles and climbs. I find hollowtech bb's stronger imho.😀