Schwalbe Marathon Plus HS 440 The new Flat-less tire. After 10 years, we have the Marathon Plus overhauled thoroughly. The only true Flat-less tire gets a new, dynamic profile, and features many inner values: rolling resistance. The patented, 5 mm thick SmartGuard A-location has towards all generic products a clear advantage in rolling resistance. In the latest version we build our lead from even further. recycling. In the SmartGuard we now use a percentage of recycled rubber. anti-aging sidewall. Withstands typical overloading due to insufficient inflation pressure for much longer before cracking that. E-Bike Ready. The most important variables are tested and approved for E-Bikes up to 50 km / h. The following sizes bear the ECE-R75 mark: 47-406, 47-559, 40-584, 37-622, 40-622, 47-622.