Alex CXD6 Wheelset Clincher or tubular?
That wheelset includes clincher-style rims that are tubeless compatible. 

Be sure not to confuse tubular with tubeless. Tubeless looks similar to a clincher (beads on each side, open on the bottom), but doesn't use an inner tube, while tubular is a single whole tube with tire and inner tube combined; these tubular need to be glued on the rim.