Bicycle tyre size 28 x 100 inches size etrto 25 622 diameter inches 28 inch applications touring street electric bike type clincher reflective puncture protection schwalbe green guard dual compound weight 520 g series schwalbe marathon schwalbe unplattbar min reifendruck 6 bar max tire pressure 8 bar tpi 67 gummimischung endurance tyre profile hs420 max load 75 kg colour black puncture protection