I have rode with 23 and 25. Air them to the max and have had one flat in eight years on Ragbrai. I rode through the area where the kids had thrown out tacks and didn’t get a flat. I remember going around the street sweeper that morning and thinking, what a crazy time to schedule to clean the road. I had no knowledge why they were doing that till the end of the day and everyone was talking about all the flats. My suggestion is ride on what you normally do, and enjoy the ride.