This is all great info! Thanks... I ordered some of the tires that we currently have on the bike online last night. I don't want to not have any in case of issues. We like the way these tires are riding (the Continental Gatorskins 700x28)so we are going to keep going with those for a bit. Do you find that less than a 28 tire affects the way the bike rides? I figure the 28 is on the bike for a reason - but not certain if anyone has any success with a different size.