Guaranteed specified weight. Our best selling Guaranteed specified weight. Best use for triathlon, time trials and road races with good quality surface. Unique construction is based on the width of the tire tread. Wide tread overlaps and protects the side wall against damage. Underneath the tread is located a puncture proof ply, coloured differently than the tread, serving also as a tread wear indicator. Right under the puncture proof ply is a buffer consisting of rubber cord composite with circumferential orientation. The buffer further shields the tire against punctures and significantly contributes to lowering the rolling resistance. Thread count underneath the tread - 305 TPI.