I'm going to buy a used wheelset for training. How many miles should a set of Easton Velomax Circuit last?
Impossible to predict. How heavy was the original owner? How careful or abusive? Ridden only in dry, clean conditions or in rain and salt a lot?
Inspect the brake tracks for scoring and damage as they are the best indicator of wear. Also check the spokes for uniform tension and look for scratches or dents in the rim's bead seat area. Do the axles turn smoothly and with no play or noise?