5spd hubs w/out brakes on SA's site are listed as around 1060-1230g. My Brompton catalog says the 6spd is +920g. I'm guessing SA is just giving the hub and not the shifter/cable,and that Brompton is giving the whole hub/der/shifters/cables setup,so from that it sounds like you're saving prolly like a 1/4 lbs with the 6spd system.