I guess I am an anomaly. I use the optimal tire pressure chart shown in a biking magazine article that several years ago introduced this topic. I weigh 162 and run my 28s at 60 psi. If I was more anal the front would be a few pounds less. My ride feels great. To understand the graphic, you need to break up your total weight - 55% back and 45% front. Then find your mark on the proper tire size and move left to see pressure.