makes me wonder a bit about your chainline being a tad severe and hitting the pin at too acute an angle? wonder if slightly longer or shorter bb would help? On Wednesday, February 19, 2014 10:07:23 AM UTC-8, Jim Bronson wrote: > > I am having some problem with my chain jamming when I downshift from the > big ring to the middle ring on my Sugino XD600. I have been observing > this, and it appears what is happening is the chain is wrapping completely > around the pin that is supposed to facilitate upshifting. > > Now, the XD600 is said to support 7/8 speed, and I am running a 9 speed > drivetrain, but from everything I've always read on here, it shoudn't pose > an issue. Perhaps it is the chain I am using? It's a SRAM PC971. I was > thinking of trying a KMC or Shimano chain just to see if it eliminates the > problem. > > I really like this crankset otherwise, the 46/36/26 works really well for > the riding I do. I just think the jamming is potentially hazardous. For > now, I just really ease off the pressure when shifting chainrings, and then > if it does jam, it doesn't throw me for such a loop. > > Any advice? > > -- > Keep the metal side up and the rubber side down! >
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