Get the 25s. They will fit about anything. I even have one that I use sometimes on my track bike (i.e. something I race at the velodrome with) and it barely fits.

For road, I personally prefer the 28's as they are designed to run at 60-90psi
Michelin specifications (min/max):
28: 60-90psi
25: 75-110 psi
23: 90-115 psi

You will be just as fast on either of the 3 sizes, it rather depends on how stiff you want the ride to be.


I see no reason to use a 23, other than style or frame clearance. With a tire like this, a 25 or 28 is just as fast on a smooth road, but faster on rough or imperfect roads.