Kenda Flintridge Pro Tire - 650b x 45 Tubeless Folding Black 120tpi GCTKenda Flintridge Pro Tire 650b x 45 Tubeless Folding Black 120tpi GCT. Born in the hills of Kansas the Flintridge takes its name from the local sharp jagged rocks. Hones to perfection with a smooth centerline tread pattern that is equally at home on pavement and hard pack. The Flintridge shifts from the fast rolling center to the grippy transition and shoulder knobs for control in loose rock and even mud. A gravel crushing tire to rule them all Front