Currently, I have been riding with both Hutchinson Carbon Comp 700 X 23mm tires inflated to 125 psi. Yes, I thought that the higher the psi, the faster one went. Of course, it has not been the most comfortable. It was not until recently that I started reading about better road bike tires and using different psi for both front and rear tires. Since I am primarily a mountain biker and weigh 184 lbs, I thought that maybe I should switch to the 25mm tires for a little more comfort and easier handling. Of course, I also think that a better tire will make a huge difference.

I never really researched the Hutchinson tires. I just bought them a good price. I would not be interested in switching to anything wider than 25 mm.

So, after reading all the posts, it does seem to me that there is just not much difference and that considering my weight and cycling background, the 25 mm will be a better choice for me. Thanks.