I will ask here since my LBS does not know, and I am likely to get the most expensive answer from the other LBS and Shimano:
I sheared off both sides of my 10 speed 105 rear derailleur short-cage this morning (the arms holding the upper and lower pulleys). the pulley wheels and the main body of the derailleur seem to be fine. does anyone know if:
a) I can get this replaced under warranty (stock on new bike)
b) if shimano sells rear derailleur cages separately, or do I have to plunk down for a whole new rear d.
c) if the latter, can I retrofit older shimano cages onto the new 10 speed one?
a related question is:
the 10-speed chain is also busted open--is it possible to cut and replace the mangled link, or would this require two special shimano-pins, and therefore would I better just replace the chain?
BTW this is on a relatively new bike, so the whole new chain-old cog issue should not apply.