OK, let's try this again. I have a Fuji 2007 Crosstown 2.0 hybrid that I have been using to commute back and forth to work with. I truly like the hybrid I like the raised handlebars, and wider saddle. It has 700 X 35c tires, and 22m rims. Ive just recently joined a bike club and am looking to get some more speed without having to go out and spend $1000+ on a new road bike. What would be the thinnest tire I could get away with?