Originally Posted by
kleinboogie
It's probably your frame that's flexing, they all do. GL
Originally Posted by
topflightpro
You are more than likely flexing the frame, and not the crank arm.
Interesting. Frame is a 2010 Tarmac Elite.
Originally Posted by
LowCel
I remember reading an article a few years ago comparing flex in crank arms. The most flexy compared to the stiffest was in the fractions of a mm. Not nearly enough for most mortals to ever notice.
I'm OCD like that. Once I saw it flex I was fixated on it and started inspecting the arm for cracks.