My commute is 16 miles one way. I try to ride as often as possible and have recently done a few weeks where I commuted 5 days a week. Over the past 2 years I have become totally addicted to cycling, and have fallen in love with it. Though, for 2 years I have been riding with backpack on a road bike.

I want to keep the bike as light as possible, so no racks and no fenders if the weather allows it. For wet days I have a set of SKS Raceblades which I recently tested and seem to work quite nicely for the purpose.

For at least one day a week I need to bring my clothing and towels into work. This would be Monday. On Friday's I would have to take home my dirty stuff. Technically that would allow me to ride packless for 3 days.

Even though I should be able to ride packless for 3 days at least, I haven't been able to actually do so. I don't know what it is, but I always end up riding to and from work with a backpack.

Any of you have an idea on getting rid of the pack and commute as light as possible?