The ffwd disc wheels offer the best in aerodynamics and lateral rigidity in triathlon and time trials the ffwd disc is combined with ffwd front wheels like f4r f6r f9r or three or five depending on the course and weather conditions features speed strength durability for both shimano and campagnolo exceptional aerodynamic efficiency high lateral rigidity available in tubular and clincher version track tubular weight clincher 1445 gram rear rim width 20mm max tyre pressur