WTB RADDLER 700x40 TCS LIGHT FR FOLDGravel Cyclocross tire with tread designed for dirt, gravel or loose terrain Center and intermediate knobs on the Raddler are slightly taller than those of the original Riddler, thereby increasing tire lifespan without negatively affecting rolling efficiency Tall, toothy outer lugs ensure your favorite gravel descent doesn`t unravel in the final corner FR: Fast Rolling, with WTB`s Dual DNA rubber compound that optimizes efficiency, traction and