The FBF combines extreme cornering capability, low rolling resistance, and fat-tire volume for unsurpassed grip on uneven and loose surfaces The FBF combines extreme cornering capability, low rolling resistance, and fat-tire volume for unsurpassed grip on uneven and loose surfaces DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners EXO equipped models feature Maxxis` EXO sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required