[Blue Bomber Man]

Two years ago there was a congressional sponsered research about rolling resistance, the study came to be about 180 pages, it found that the best RRC was found in tires that were 15-16".

My suggestion is to find the best RRC tire, than worry about your gearing ratio, so you can differentiate between the two different variables.

Look for my reply on the "success stories" board, regarding tire effieciency and tire inflation, it also covers this topic.