I had trouble removing pedals from my old Cannondale, and it basically became easy after a spray or two of WD-40 each day for about 3 days. I was about to give up, but when it did break loose, it wasn't hard at all.
I also each day after spraying on the WD-40 tried to remove the pedal with hand pressure, and hammering the wrench.
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Slow Ride Cyclists of NEPA
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