Schwalbe MARATHON STANDARD Tire 27.5 X 1.65 Clincher Rigid Black ReflexThe archetypal high quality touring tire. The highly elastic GreenGuard layer is 3 mm thick. One third of the GreenGuard is made up of recycled latex products. The Anti Aging sidewall can withstand the typical cracking that results from overloading due to insufficient inflation pressure for much longer. You can choose every Marathon for your E Bike (E 25). The main sizes are approved and tested for E bikes up to 50 km h (E 50).