Here is a study on different wheels builds and power required to propel down the road. YES all the wheels are off topic but one can draw some great concussions that would apply to on topic built wheels.
http://bikephysics.com/
Charles Nighbor
Still in Sunny mid 70's Walnut creek, CA
PS Those in cold winter cimates allowed to cry
PSS It did spit some warm rain late in the day after my very nice bike ride up Mt. Diablo
http://www.parks.ca.gov/