Any of you folks who race ever run 25mm tires? I've always used 23s and train on the 25s to gain a bit of protection for my rims. When I time my rides with the different widths I cannot see a pattern of better times with the narrower tires. But on race day, I stick on the 23s thinking they will be faster. I figure this is wishful thinking. I know there is more to a tire than its width, just wondering if anyone races on 25s. The only thing of note I've seen on tire selection is a tendency toward faster times on pure slicks vs. any tread. This if both tires are of equal quality and weight. I really think any tread is a speed killer. All my racing is time trialing so seconds count. A 2 second gain per mile is to kill for. I find slicks are about 3-4 seconds faster than treaded race models.