Originally Posted by
SquidPuppet
Every other rotation is weird.
Square taper or other?
Check chain ring bolts for tightness.
Inspect chain ring for cracks.
Remove drive side crank and inspect arm, pedal hole, and where the spider fingers join the arm. Looking for cracks.
Check bottom bracket for installation tightness. Check BB bearings.
Sometimes pedals make noises. Try the bike with a different pedal.
I have been having the same issue on my bike recently too. It squeaks when pedalling. (Already checked chain ring bolts, for cracks on chainring, tightened crank arms and pedals). What kind of grease should be used when re-installing the drive side crank?
Dave