I own a Bike Friday 'Season' Tikit now .. it takes the Brompton sized rim & has a 135 rear hub, not an 11 speed but it fits.. (has a Sram I-9)
their new Pakit is lighter than a Brompton, and they make several sizes and a long list of options on the build menu.. including Gates belt drive..
The wholesale Importer of Bromptons to Australia is Greenspeed , they re machine SA drum brakes for their recumbents and have re machined a 74 wide drum hub for Bromptons..
and Pakit/Tikits, that also use a 349 rim/74 axle front hub.
so a rear drum 4 or 8* speed SA hub is possible with Bike Friday Pakit
they're good at building with 24 spoke 349 rims and 36 spoke hole hubs too..
* SA 4 & 8 speed are 1:1 1st gear , so Ideal for small wheel bikes. 3 & 5 are 1 for middle gear and (b over a) and (a over b) ratios over and under drive..
[Been using my Bike Friday Pocket Llama all winter, on the Oregon coast]
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Last edited by fietsbob; 04-30-18 at 09:10 AM.