Schwalbe Marathon Plus MTB Tire - 27.5 x 2.25 Clincher Wire BLK SmartGuard Dual CompoundSchwalbe Marathon Plus MTB Tire 27. 5 x 2. 25 Clincher Wire Black SmartGuard Dual Compound. Schwalbes most puncture resistant MTB tire is now approved for fast E Bikes. The central rib design rolls easily over hard paths while strong outer lugs provide great off road traction. The SmartGuard provides superior puncture protection against foreign objects for a reliable ride. TECH SPECS Color Black Defined Color Black Designed for ebike Yes Flat