Originally Posted by
mercator
I'm quite happy riding 23s pumped up to 105, but maybe I don't have the same issues everyone else has.
There is a lot of nice fresh tarmac to ride where I live.
Nothing wrong with 23mm. Heck, I remember running 21mm tires on road bikes in my younger days and never had any issues. That said, I don't see any reason why someone would chose anything narrower than a 25mm for a new tire now unless fit is an issue. Comfort aside, there's plenty of data out there showing 25mm tires to be as fast or faster than 23mm.
Pro riders (to my knowledge) are all currently on 25mm and wider. Some are running 26-28mm. They're not doing this for comfort.