Tires Cycling, Outdoor Recreation, Schwalbe, Sports & Outdoors, Tires & Tubes Schwalbe Marathon Plus HS 468 SmartGuard MTB Bicycle Tire – Wire Bead – 29 Review by Coyotea September 11, 2018 No Comments SmartGuard Dual Compound 1270 g (45 oz) 67 epi Now with a new dynamic profile. On the central rib it rolls easily over hard paths, while the strong outer lugs give it great off-road traction. The SmartGuard provides superior puncture protection.