Are there any advantages in having a 700x25 tyre over a 700x23 when using a cycle trainer? If you are "training", resistance is surely not a huge deal breaker. I assume cycle trainer tyres last a ...
I just measured the inner width of my rim with a ruler and it seemed to be a hair over 14mm. Looking at the tire sizing chart on Sheldon Brown's site it doesn't have an entry for 14mm inner width ...