M6L Brompton , 44t chainring, seems to be said to climb well..
My addition of a Schlumpf crank, turned my M3L into an Alpine Goat..
Numbers, 15t on the hub, 54t chainring acts like a 21.6t,
when I kick in the reduction planetary gear in the crankset.
Last edited by fietsbob; 06-16-13 at 10:45 AM.