Subject: Re: Chain Rign Compatibililty Posted by: Al on December 11, 2003 at 07:04:39: In Reply to: Chain Rign Compatibililty posted by Jim on December 11, 2003 at 01:41:33:

Message: >Can an Ultegra triple chain ring set be used on a Dura-Ace triple crankset? There doesn't seem to be a 30-42-52 or 53 Dura-Ace chain ring set, and I don't like the 30-39-53 Dura-Ace standard. NO. The Ultegra triple crankset has standard 74BCD mounts for the inner ring. The Dura Ace triple crankset uses a special middle chainring which apparently has a proprietary BCD inner ring -- more to the point, there are no bolt mounting holes for the inner ring on the actual Dura Ace crank arms.