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Old 06-03-13, 02:04 AM
  #12  
MichaelW
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Join Date: Feb 2001
Location: England
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In the UK, frames by On-One, Cotic, Charge and Genesis would do the job.
I would strongly advise against mixing alfine with derailleurs and double chainrings. You loose the clean chainline and you will be surprised how much crud gathers in the pulleys.
Consider where you want the disc brakes: seatstay for easy cable routing, chainstay for compatibilty with rack and fenders.
Consider the options for chain tensioning:
Sliding vertical dropouts
Horizontal dropouts
Eccentric with
-external clamp
-internal wedge
-internal wedge with release mechanism
-set screw
A spring-loaded tensioner, even the Alfine one, is really for a retro-fit of an existing bike.

I would be strongly tempted to build a belt-drive version.
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