I would suggest against it. Also, to the 230lb. guy with Zipp 404s on his tandem: Something is wrong with that. One of my wheelsets is a pair of Clydesdale-specific 404 Max wheelset. Those are rated at a max rider weight of 275 lbs. When I was looking, at carbon wheels, those were rated higher than the others I could find. Most carbon wheels are rated at under 200 lbs. with a few clyde-friendly models- which less than a handful of these even were recommended up to 250. BTW, 404s are race day wheels. They aren't practical for daily riding. There are other carbon wheels- like Easton EC series, that are better suited for daily riding. However, even those are questionable at Clyde's weight IMO. I would think that even if these wheels could handle the weight, any failures would leave you with a voided warranty due to weight limits.