Usual commute is 6 miles each way with big shoulders and very mild hills. Sometimes more. Monday I have to do a HUGE climb and about 12 miles each way.
Gary Fisher Rig, 180mm cranks, 36x22, Nashbar trailer, 50+ lbs of carpentry tools. Fenders and Nokians are going on soon. Probably gonna wuss out and get an Alfine soon for higher top speed and easier climbing with the trailer.