No, but it's hard to get an exact on weight limits anyway because the nature of the riding is usually a more important factor than only taking rider weight into account. Also, wheel companies want to do as little warranty replacement as possible so they don't want to replace a wheel when you jumped off a 12-foot cliff and cracked your rim in half just because you are under the "rider weight limit." Even the lightest weight limit wheels will hold up under just about all road cycling conditions for everyone except possibly professional riders and their higher wattage output during sprints. Yes there are static weight limits on wheels where the rim will break/buckle under a certain static load (i.e. no movement just added weight), but that's more like 1000lbs. because the jarring it will take when riding will mimic these kinds of forces on a 175 or 250 lb rider on certain impacts/bumps. If you are concerned about potentially catastrophic failure (i.e. break in the rim throws you over the handlebars or out into traffic), I would suggest always "breaking in" a new wheelset by riding it under the easiest conditions first, getting used to the feel, flex, and the creaks (if there are any) and then gradually go more all out from there. Heavier riders will get more flex out of wheels, but they won't actually break. All wheels, even full carbon/carbon spokes, will flex quite a bit before they will fail/break so you should be able to tell the limits if you ever actually approach them before you actually break anything.