I read everywhere that 20" folders are better for longer distances than 16" (i am going to buy the first folder, so I have no experience).
Can someone explain me why larger wheels drive better? Is this only because 1 rotation of your feet result in less distance, so a 20" is faster? Are 16" using a lager cogwheel/cranck (=cost more energy to rotate) to compensate the small wheels?
If you can drive 20-25 kmh (12-16 mph) on a normal bike, does it cost much more energy to reach the same speed on a 16"" or 20" folder?