An acronym for "Shimano Pedaling Dynamics", a design of clipless bicycle pedal created by Shimano, Inc. Both road and mountain variants exist as do numerous "SPD-compatible" designs.

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How to prevent accidental unclipping while cornering?

I have less than 10 hours on SPD pedals. Unclipping is becoming more and more intuitive (I no longer fall to the side when stopping at a traffic light). While it still intimidates me to jump with ...