Named after the the cross crusade in portland oregon usa the largest participant cyclocross series in the world clements crusade pdx the portland airport code is an all around performer with a particular love for mud the centre knobs are aligned to give you a fast roll on hard pack and pavement side knobs offer superior edge control so your bike stays under you in the curves and the leading edge of the knob gives you extra traction coming out of corners since its introduction in 2010