Features Rolling resistance. The patented, 5 mm thick SmartGuard layer, when compared to all generic products, has a significant advantage in rolling resistance. We further extended its lead in the latest version. Recycling. Also in the SmartGuard, we now use a proportion of recycled rubber from old latex products. „Anti-aging“ side wall. It now lasts much longer before developing unsightly cracks when subjected to use with too low air pressure. E-Bike ready. The main sizes are approved and tested for E-bikes up to 50 km/h. Following sizes carry the ECE-R75 mark: 47-406, 47-559, 37-622, 40-622, 47-622. Product Features Size: ETRTO 37-622 (28 x 1.40 Inch) Typ: Wired Compound: Endurance Execution: SmartGuard Skin: Twin Pressure: 4.00 - 6.00 Bar (55 - 85 psi) Maximum load: 95 kg EPI: 67 Color black-reflex Weight 900 g (32oz)