The best pump ever made! If you've ever had problems seating tubeless tyres this is the pump you have been waiting for. Pre charge the main barrel and release a surge of air to seat your tubeless tyre, then use the pump as normal to set the correct pressure...genius! Alloy barrel for smooth pump actionAuto-Select head effortlessly fits Presta or Schrader valvesTop-mounted 160 psi gaugeThree-arm base gives excellent stabilityInflates tubeless-ready tires without a compressor