Most tubes have a range printed on them. For example, I have some 700x28-32c tubes. Check your current tubes; they may be 700x35-38c, but they may still work if you can fit them in there.
Originally Posted by slopvehicle
Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.