Thread: 10-Speed Ultegra Chainring question
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Old 11-20-09, 08:51 PM
  #7  
davidad
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If you have the ****mano 6703 with the 92mm small ring you will have to get a TA adapter middle ring that will allow you to use 74mm BCD rings. May as well go with a 24t just in case you ever need it.
The 6603 uses a conventional 74 BCD ring.
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