Maxxis Beaver EXO Dual Compound Folding 60 TPI Mountain Bicycle Tire The dual compound tread utilizes a hard base layer to reduce rolling resistance and provide knob support, while the siped, softer outer layer provides unparalleled grip on wet rocks and roots. 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 help prevent puncture from sidewall abrasions Weight Model Number TB96737000