Bicycle tyre size etrto 55 559 diameter inches 26 inch applications street city balloon bike electric bike type clincher reflective karkasse schwalbe twinskin weight 920 g series schwalbe big apple min reifendruck 2 bar max tire pressure 4 bar tpi 50 gummimischung sbcaddix speedgrip tyre profile hs430 max load 115 kg colour black