Are these that durable? I would think brass...
Are these that durable? I would think brass would be heavier and weaker than steel would be. I suppose stronger than aluminum?
Your cleat has to be softer than your pedal to ensure that the cleats wears down instead of your pedal.
As for weight, each cleat weighs 15 grams, which is the same as about 6 pennies. So, probably not a big weight concern there. ;)