Bicycle tyre size 28 x 150 inches size etrto 40 622 diameter inches 28 inch applications electric bike touring type clincher puncture protection smart guard flat less weight 810 g series schwalbe marathon schwalbe unplattbar min reifendruck 35 bar max tire pressure 6 bar tpi 67 gummimischung endurance tyre profile hs420 max load 100 kg colour black puncture protection