Hi,
Just bought a new Trek 7.5FX WSD a couple weeks ago and it comes standard with Bontrager Race Lite Hard-Case Plus, All Weather, 700x32c tires. I wondered at the time of purchase if I might like to switch out the tires to 28's so that I could move faster, but the LBS told me to try first and they would change them later if I wanted. (I came from a hybrid with 40 tires). I'm always interested in 'lighter & faster' in an effort to keep up with my husband and am now wondering how much advantage speed-wiseI might get (if any) from changing to smaller tires. Also, what would be the disadvantages, as I'm relatively new to all this. I only ever bike on the roads, if that is important info. Thanks so much.