Subject: Re: Chain Rign Compatibililty Posted by: Robert on December 11, 2003 at 08:35:08: 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. You can use the 42T and 52T as both Ultegra and Dura-ace are 130mm BCD for the two larger rings. But the 30T won't work. As Al pointed out, the inner ring on the Ultegra is 74mm BCD while the Dura-ace is 92mm BCD.