I tried running low pressures on the front as this calc (and others) suggest. The tires get too smooshy when you stand or otherwise put more weight on the front, the bike doesn't handle as sharply in technical descents, and I got too many pinch flats. I wound up increasing the front pressure incrementally from around 70 psi and settled on 90. Rear is 100. 25mm tires 170 lb.