I have the new 25mm wide rims, so my 23c tire is 26.5 mm wide, with a similar air volume to a 25/26c tire. The only downside to this setup is a higher probability of sidewall cuts, since the tire shape is wider. I had a sidewall cut in the first 100 miles of the new wheels, and nothing in the last 2000 miles.

At 175 pounds on these rims, I was running 85/105 psi, and the ride seemed smooth and fast.

I recently started using 78-80 front, and 90-94 rear, and it's even more smooth and just as fast. The steering response is still quick. I'm a little more careful on rough RR track crossings to avoid rear pinch flats. On a fast group ride, I might add 5 psi front and back, since hitting potholes is somewhat more likely on those type of rides.

120/120 psi on 23c:


80/92 psi on 25c: