Shimano Ultegra 39T chainring compatability
06-13-13, 09:45 PM
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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?
06-13-13, 10:50 PM
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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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06-14-13, 06:43 AM
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