I average between 13.6 and 14.9 mph on my 12.4 mile trip across Raleigh. Rolling terrain, all city streets. That's door to door on a Surly LHT with rear panniers-one with cloths and lunch for the day and the other with lap top and an accordian file, a few tools and tubes between the two.

The 0500 departure makes the faster time fairly regular. The evening traffic and headwind (occasional in the summer, regular other times), drops me to the lower number and occasionally slower. I can do the faster time in the evening, but I have to work late and treat the ride as more of a training ride. AM is very slightly more down the up.

I can average 21-22 on the flat with little to no wind for 30-35 miles on my CF bike, solo by way of reference.

JW