Maxxis Ignitor SC EXO Tubeless Ready Folding Bead 60TPI Bicycle Tire The well-spaced tread pattern fills in nicely to provide low rolling resistance in the straights, while the ramped pentagonal knobs provide excellent traction in the corners and in medium soil. SC - Single compound casing for a durable, dependable tire EXO equipped models feature Maxxis` EXO sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required Model Number