call me a cynic, but i am not impressed with the new shimano road cranks. our shop is strongly behind the compact crank vs triples, so I haven't had a chance to closely look at a 6703 or a 7903 but the design at the tech docs shows a total abberation of chainring assembly on what should be a simple and straightforward chainring/bolt assembly. the new ultegra triple in the tech docs looks like an 80's mountain crank and thats depressing.
shimano part # Y-1LK 98020.
as to the OPs grinding noise despite the ostensibly correct derailleur placement and adjustement, i vote the crankset itself is funky business.
Last edited by Bekologist; 09-09-10 at 08:21 AM.