this may be why the springs of most derailleurs move the cage away from the wheel... in the sudden loss of cable tension the derailleur wouldn't SPROING into the spokes.

dork disc. quaint. love to see the guys with carbon Zipps and Mavic premium wheels come in to the bike shop looking for the spoke protectors, 'the really big ones'.

it's faintly hilarious when asked to install a dork disc on a 1,500 gram wheelset.