The clement crusade pdx 700x33 tyre the pdx was built to be the weapon of choice for portland39s vibrant cyclocross scene the lugs are built to provide enough grip in wet and muddy conditions but spaced widely enough not to pack up with soil and minimize rolling resistance the center 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 tr