Originally Posted by
indyfabz
I routinely ride around town performing errands, etc., on 37c Conti Contact II tires. Just did on Saturday, covering at least 20km. Doesn't get old at all. The previous weekend I went out for a little 25 mile rides, on the same setup. About 11 miles were dirt, the rest was pavement. It's a favorite short, local route of mine. YMMV
Again, the OP said all highway. I was simply replying to what he said and I was replying based upon years of being a roady who also has a mountain bike. And someone who plays around with tires quite a bit. I really feel the difference between 23 tires and anything wider. I guess it is a relative thing. I just put on some new 23's to replace some 25's I had on the bike I bought off Craigslist and for me it is a big positive difference for all road work, which is what the OP said his commute was.