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?
Extra Medium Member
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.
Thanks, that's kinda what I figured after looking at them but I wanted to know for sure.
Originally Posted by redtires