K-Shield. The protective layer is applied between the casing and the tread. K-Shield is made from ceramic particles and aramid fibers. Fewer punctures reduce repair times and extend your enjoyment of riding. Additionally, K-Shield decreases rolling resistance. • Wheel size: 28 inches • E-bike compatibility: Manufacturer recommendation up to 25 km/h • Delivery contents: single • Intended use: City & Trekking • Details: - Comfortable rolling due to the wide center rib and grip from the side lugs - Comfortable premium trekking tire - Usable for front and rear wheels • Design: Wire tire • Version: K-Shield.