Had a tubular set built with my PT in them. Very solid wheels and not weight weenie even remotely. Hated them for the single reason that the area where the tire sits is so flat that it caused the tire to have poor gluing contact and less surface area to attach to. Even when the tire was glued and left to dry deflated so it would glue to the entire surface, the moment you inflated it to 120 PSI it seems like half the glued surface would come undone. First and only set of wheels I've had that was like that, so I now use the rims to stretch new tires!