Originally Posted by Alexi
can you put 2 chain rings up front and run them to a coaster brake with a tensioner?
I don't think that would work too well. For the same reason you wouldn't want to use a tensioner on a fixie. If you want a multi-speed coaster brake, you might look at Sturmey-Archer or Sram 3/5/7 speed coaster brake hubs. The Srams are pretty nice. There's also older Sachs or Bendix 2-speed 'kickback hubs if you can find one.
Jim