Originally Posted by xenologer

Just had a thought on dealing with derailer drivechain's and how they conflict with chain casing...

Recumbents often use lengths of teflon tube to protect clothing from the long chain runs.

Perhaps something slightly flexy like that tube can be used to accomodate the changing path of the chain through a derailer drivetrain? you'd just need some kind of accompanying flexible guard around the places where the chain meets sprockets...

wouldn't be airtight by any means, but might help out a lot with stuff flung up from the road if used along the bottom run of chain...

Think it might work?