The Sender is for those who believe sending it shouldn't be exclusive to long-travel mountain bikes. As the first Road Plus tire designed solely with dirt in mind, the Sender promotes trail exploration with drop bar efficiency and mountain bike traction. Widely spaced outer knobs dig into loose terrain with ease, while the 650b x 47 size ensures they'll still squeeze into most gravel and endurance drop bar frames. Tightly spaced center knobs minimize rolling resistance while substantial outer knobs hold your line when you're pushing into the drops. Wish your road bike had mountain tires? The Sender is for you.