Greetings! I have a fitness bike, a Trek 7.7FX that originally came with 700x28 Bontrager Race Lite Tires. When I wore those out, I replaced them with 700x25 Bontrager Race X Lite tires. I now wore those out and I am looking for new tires. Most of the good tires are 700x23. What would the advantage of getting 700x23 vs 700x28 tires for my bicycle? Thanks for your help!