Bicycle tyre size 28 x 110 inches size etrto 28 622 diameter inches 28 inch applications touring city electric bike type clincher reflective puncture protection smart guard flat less weight 750 g series schwalbe marathon schwalbe unplattbar min reifendruck 55 bar max tire pressure 75 bar tpi 67 gummimischung endurance tyre profile hs440 max load 85 kg colour black puncture protection