Thanks, I'm running pistons with spring, oil and air in front and Arnott Aldan air in rear. I had the Aldan dialed down on my last trip and the bike road great. Now I added front air because I have a 23' front wheel with a bolt on Picard Trees, and the bike bangs off stop insert in front forks. I thought the air would take care of that problem and I am sure it will but I wasn't thinking about the ride, I don't want to lose the comfort I had.It's a little more critical than that. Need more info. What are you using up front? Pistons, cylinders, or air over oil. My bimba cylinders required 175 psi to fully extend. I now run air/oil, no pistons. Run those at 75 psi. Rides great. For my rear it's somewhere between 70-90 depending on conditions. I run the monroes out back.