Originally Posted by
Jipe
The 4 sprockets are the same on the 4s and on the 12s and the BWR hub has a 1:1 ratio on its second gear, so with the same chainring size, the gear inches must be the same for the 4s and 12s on its IGH second gear.
Brompton sez the BWR and the IGH for the 12-speed are 'different inside and out'. They're certainly different outside:
What if 2nd gear for the 12-speed IGH isn't 1:1?
Naw, that's crazy talk.
