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I have a cheap road bike (fyxation pixel), I bent the left pedal and the crank arm thread because it wasn't fully threaded in (shame on me for not checking it). Anyway I replaced the left crank arm with another one, and replaced the pedals and it was fine for another 1.5 months but it just failed again.
This time it's the part of the arm that threads onto the spindle. The right arm / pedal is fine, it's just the left that fucks up. Is this just an inherent problem with square taper cranksets? Should I upgrade to a fancy bike finally because I'm riding this one too hard?