Someday I might swap my 105 triple 30-42-52 (9 spd) for a 39-53 double. But before I do that I want to get used to the gearing and see if I should swap my 12-25 rear for a 12-27 (or even 11-23...NOT).
My question: Will the 39 and 53 Ultegra 9 spd chainrings I found at Performance fit on my 105 triple? Is the bolt pattern different? What about spacing? I just want to make sure before I blow another $50 + shipping. I am anticipating some minor front derailleur adjustments, though. Thanks.