The Marathon Plus is Schwalbe\\\'s best selling model and the most puncture resistant pneumatic tyre there is. In addition to the superior puncture protection, it also features: A patented, 5 mm thick Smart Guard layer, which gives a significant advantage in rolling resistance when compared to generic products. The Smart Guard uses recycled rubber from old latex products. The Smart Guard lasts much longer before developing unsightly cracks on the sidewalls. Due to its great properties, the Marathon Plus is the best choice for E-Bikes (E-25). The main sizes are approved and tested for E-bikes up to 50 km/h.