Originally Posted by
Winfried
You mean that with the right gearing (eg. 52T + 8-speed 11/30), a 16" can go as fast as a regular bike?
Yes. Or an internal gear hub. The Brompton 6sp with the +8% option gets to 107 gear inch.
((794 * 1.08) / 2.54) / 3.14 = 107.51793
http://www.brompton.co.uk/page.asp?p=3069
I am using the -12% option. It gets only to 87 GI but gives extra low range for steep hills.