Washburn is our fastest-rolling gravel tire, built for race-day efforts on hard-packed gravel and backroads but practical enough for your daily commute and rides around town. The center slick minimizes rolling resistance for greater speed and momentum, while the transition knobs and raised side lugs are spaced out to provide cornering traction and shed debris. The 650b x 47 mm size offers increased volume for a larger contact patch and more grip.