I've been running Vittoria Open Corsa CX's in a 25 for the last four years. Decided to try something new as Corsa's have been discontinued and wasn't really digging the skinwall look of the new Vittorias. Read some good things about the Schwalbes and the rolling resistance spiel on that website. Mounted them up and went for a ride, got about two blocks from my house and turned around thinking I had somehow put too much air in them (always ran 85 psi in the Vittorias). Checked on my nice Lezyne pump that I always use on road tires, right at 85 psi, hmmm. went back out, wow these things feel like $20.00 crap training tires compared to the Vittorias. Just to make sure I checked that I didn't get the tubeless ones by mistake. Fooled around with air pressure when I got home, tried them even lower than I'm comfortable with to not get a pinch flat and they still felt like a cheap, stiff training tire. Live and learn I guess.