I have a set of these Shimano pedals for about 2 years now. The right pedal spins freely at all times, as it should. My left pedal tightens up where it is hard to even turn by hand after about 5 minutes of riding (once I can actually get it back loose). I have no idea what's causing this, it's greased well and turns just fine while loose but no clue why it keeps tightening up on its own. Just started doing this the last 6 months, any help appreciated.
by Ready_Geologist1469