Short version. I have an old bike I make pretty ridable! It originally had 23mm tires and I wanted something bigger because the roads in the northeast are just awful. 25 will fit in the back and I can do a 28 in the front. I figure that may help with the impact of long stretches of road I cannot avoid.

Is that bad? I was going to run both at a slightly lower pressure since I am not too worries about speed.