Meiser Accu-Gage Fat Bike Presta Valve Low Pressure Bicycle Tire Gauge Compact design fits easily into handlebar or seat packs Helps to fine tune tire pressure for the ultimate in performance Low 15 psi range ideal for 5" fat bike tires where the smallest variation of pressure has a large impact on ride quality and traction For riders trying to figure out whether 8.25 or 8.5psi is the best jam for the softest conditions Imported