The fastest and lightest marathon. Excellent quality for intensive use. RaceGuard puncture protection level 4. A double layer of nylon fabric provides good protection for lightweight and sporty tires. Speedgrip is a very sporty rubber compound with extremely low rolling resistance and remarkable grip. Skin describes the texture of the sidewall. Lite means a lightweight, thin sidewall that consists only of the rubberized carcass. E-Bike Ready 25 - For regular pedelecs with pedal assistance up to 25 km/h, the legislator does not mandate specific tires. However, the stresses and average speeds for these bikes are higher than for regular bicycles. Therefore, Schwalbe recommends only certain tires as "E-Bike ready 25.".