jayg
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Quote from FlyingLaZBoy on Nov 27th, 2010, 10:11pm:Quote from jayg on Nov 5th, 2010, 3:14pm:Have been experiencing a worsening squeal in the drive train of my early model 2009 X-Stream. At first I thought it might be the chain idler, but finally traced it to the orignial-equipment, SRAM X.9 derailleur. Took the jockey wheels off the derailleur and discovered the upper wheel assembly has a strange design. It doesn't have a ball bearing or bushing. The plastic wheel has about a 1/2" diameter, precision-bored hole in it, and spins around a fixed, polished, steel cylinder section. The assembly was dry as a bone. Lubed it up, and assembled and installed the derailleur - Voila, no squeal. I believe later versions of the X.9 derailleur have bushed upper jockey wheels. I think I must have the same type... no squeal, but that upper wheel has become VERY difficult to spin... Lubing it doesn't seem to have totally solved the problem, but it helped some... I didn't take it apart, but I may do that tomorrow afternoon... I'm going to ask RANS about it... If the bike wheel side of the upper jockey wheel looks like this, it's the older, bearingless design.
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