well a 39x23 spun @ 90rpm = about 12 miles an hour, a 39x25 spun @ 70rpm = about 8.7mph

Lance average a tick below 15mph.

With the steepest gradient around 9%??? I doubt you would need anything smaller than a 39x25


With a lot of bikes coming in at the weight limit, there is no real need to make some crazy cassette that would be minus the 11,12,13, etc....