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Rear derailer rollers wobbling(3 posts)

Rear derailer rollers wobblingCartman
Oct 2, 2001 4:33 PM
I have had an annoying squeak coming from my rear derailer - I lube the hell out of it before a ride, and about 10 miles into it, it is squeaking again. Tonight, I was cleaning the derailer and rollers, and noticed that one of them seemed to wobble a bit, or have some play side to side. I'm sure that this is not normal and is a sign of wear. The bike has 7200 miles, and te original derailer. do they sell replacement rollers for the Shimano 105, or do I need a new derailer?
Probably not the issueKerry Irons
Oct 2, 2001 4:54 PM
The top idler pulley on modern derailleurs (Campy and Shimano) has built in side-to-side play to assist in the shifting process. This allows the pulley nearest the cassette to center the chain on the cog after completing a shift. They come this way out of the box. If your squeaking truly is coming from the derailleur pulleys (noise is continuous, pretty much regardless of the gear you're in, doesn't change with where your foot is in the pedal stroke) then you need to disassemble and lube. You really can't lube them effectively from the outside. Very few moving parts and nothing to screw up - just remove the two bolts (one for each pulley) and the derailleur side plate comes off. They pulleys will just slide apart exposing a couple of dust caps, an "oilite" bushing, and the pulleys. Clean everything, put on a coating of light grease or oil, put it back together and your noise should be cured. If not, it wasn't the pulleys.
Some shops have aftermarket replacementsTig
Oct 3, 2001 9:27 AM
I can't remember the brand name, but they come in different colored anodized aluminum. They don't wear out as fast as the plastic ones. They look cool as well.