I use a Specialized floor pump in the morning to get 100psi in a set of Schwalbe marathons.
If I check the pressure with a Topeak Smart Gauge i get less than the 100. Which gauge should I disregard? On the road I use a Topeak Road Morph with the built in gauge. Is this gauge accurate? Most of my riding is 20-50 mile day trips with the yearly 7 day fully loaded camping trip.