Bromtons are all steel framed, save the Titanium X premium options you don't need.
and 2 IG hubs BSR, is the AW3-NIG, BWR is wider ratio %, to use 2 cogs as a half step 6 speed.

Bike Friday will equip your frame of the Tikit with a vast option list,
including a R'off hub, or Alfine 11 and a belt drive if you wish..

they will ship from Oregon to your door..