Originally Posted by
big john
I've used Shimano SPD cleats on mountain bikes since about 1993, I think, and have used them touring and even the road bike for a few years. I have never worn out a steel SPD cleat.
I don't know that I've ever "worn out" an SPD cleat, but popping a new pair on once in a while does make the pedal engagement feel a bit more snappy. I replace my cleats every few years.