Wear different clothes for the ride and change at the office?
7 miles is enough to warrant changing, IMO. I'd be a sweaty mess in my work clothes even at a light riding pace.
In my experience there is no such thing as a chain that will not mark your skin/clothing once dirt/grit begins its inevitable migration to even the cleanest chain.
Last edited by canyoneagle; 02-28-11 at 10:45 AM.