I ride my road bike, Trek 1500 WSD. My commute is 40 miles round trip on mostly country roads and/or a 65 mph hwy with a nice wide shoulder (plus some neighborhood and bike path riding). I bring just about everything I need to work the day before so I can stash just a few things in my camel back. I'm looking forward to the day when I live closer to work and can justify buying a hybrid and outfitting with panniers. I'm in the process of cleaning up my old neglected hand-me-down mtb to use for errands in town.