Originally Posted by fadetoblack6902
I have a giant quasar with suntour accushift 1500 derailluers with indexed shifting. When shifting into and out of the largest rear sprocket, the chain doesnt seem to line up with the upper derailluer pulley. It still shifts, but it makes a rubbing/grinding noise. the rest of the gears shift perfectly. any ideas?
Please bear with me - I'm trying to learn here. What makes everyone think this is a derailluer problem? Why not a stretched chain? Would a stretched chain show additional problems? Is that the reason for dismissing that possible cause?
Sorry for not getting the picture.