Rolling resistance. The patented 5mm SmartGuard layer has significant advantages in rolling resistance. In the SmartGuard, a portion of recycled rubber from latex products is used. It has a higher traction before developing negligible cracks when used with too low pressures. E-Bike Ready. Due to its excellent properties, the Marathon Plus is the best choice for E-Bikes up to (E-25)50 km/h. FILTER: URBAN FILTER: 26 FILTER: 1.35 FILTER: RIGID