Schwalbe jumpin jack bmx tyreborn to jump in the dirt designed for dirt riding large regular lugs give outstanding grip in sand and dirt special strengthening protects the sidewalls specifications size etrto 54 406 20 x 210 inch compound dual compound execution performance line skin twin weight 640g 23oz pressure 30 65 psi 2 0 45 bar maximum load 80 tread hs 331 epi 67buy schwalbe tyres from chain reaction cycles the worlds largest online bike store