Right, I guess inserting where they're made in the title would be a little politically incorrect but essentially the link below would give you the exact product that inspired the question :- Cheap Carbon Rims
The target is to use those for a cyclocross-commuter steel bike that I am building. The typical use of such a rig would be for home-work-home commute on cycle tracks with a muddy stretch of offroad along the way (short cut smirk).
I am about 180 pounds (give or take) and have had history of taco-ing alloy rims before (MTB) - so the question would be : would you trust such a product for the above use?