So recently switched tires from Maxxis EXO Rekon 2.6/Forekaster 2.35 in 120 tip to Specialized Grid Eliminators (2.6/2.3). New tires fell way stiff and hard. Running low psi 16 f/18 r. Grip and braking is much better. Is the the Grid casing a stiffer sidewalk or is the 120 tpi in Maxxis causing this? Or both?