Originally Posted by
SHBR
How fast does the OP need to go?
42T X 12T 700C X 23MM = 40KM/HR @ 90 RPM & 52KM/HR @ 120RPM
I use a triple crank with a single speed wheel, 24/38/50T X 18T.
I spin out at 50KM/HR, more than sufficient for my (flat terrain) needs.
It works for me in the winter. It gets tiresome on a faster group ride though if you've got any long 1 or 2% downhills.