Topeak SmartGauge D2
It doesn't matter how many years are under your belt; squeezing a tire is no way to determine proper inflation pressure. Topeak's SmartGauge D2, however, is the proper solution to quantifying your pressures. The gauge features Topeak's rotating SmartHead, meaning it'll work seamlessly with both Presta and Schrader valves without changing parts. The digital gauge reads up to 250 psi, so it can be used with suspension components as well as tires. Topeak's SmartGuage D2 can also be programmed to show pressure in psi, Bar, or kg/cm2.