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  1. #1
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    Shimano Ultegra 39T chainring compatability

    Does anyone know if the Shimano Ultegra 39T chainrings are interchangeable between double and triple cranks? I bought a new 39T for my triple but when I received it it was marked double. It has a different part number than the part that is listed for the triple. Is a 130mm 39T the same for both?

  2. #2
    Extra Medium Member redtires's Avatar
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    The difference is there are no ramps/pins built into the chainring for a double. The triple cranks have this to assist shifting from the small ring to the middle.
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  3. #3
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    Thanks, that's kinda what I figured after looking at them but I wanted to know for sure.

    Quote Originally Posted by redtires View Post
    The difference is there are no ramps/pins built into the chainring for a double. The triple cranks have this to assist shifting from the small ring to the middle.

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