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Squeak, squeak goes the derailleur pulley....(6 posts)

Squeak, squeak goes the derailleur pulley....Jekyll
May 27, 2002 9:08 PM
HELP: This is actually on one of my MTB's (XTR derailleur). One of the pulleys squeaks on and off. Incredibly annoying. I've tried taking the thing apart, lubing everything, blowing it out with Tri-Flow, etc.. The derailleur only has around 500 miles on it.
Any thoughts? If I can't fix this does anyone know where I can get OEM pulleys or recommend an aftermarket replacement?

re: Squeak, squeak goes the derailleur rider
May 28, 2002 2:31 AM
I raced MTB for ten years and it's commen for the pulleys to squeak after riding in muddy races. I hope your talking about shimano pulleys (stock black), not some after market pulleys like control tech.

When mine do the squeaking noise I talk the pulley off and put grease where the medal cover goes over the seal. I guess the rubber seals get dry and the bearing( part that the pin goes through) gets dry too.

On older models the pulley come apart easy, so I take emery cloth or sand paper to the bearing (takes rust off) and put a light coat of grease on it as well. The squeaking noise goes away for me.

I got this tip from my one LBS back in 1992 and found greasing both parts work. I thought today's pulleys having "sealed bearings" would need all this maintance. If the bearing doesn't come out just put some grease on the rubber area. Just wipe the excess grease off before reinstalling.

Good luck.

been there tried that, no availJekyll
May 28, 2002 6:19 AM
The XTR pulleys are sealed so all one can do is pull of the side plate and try to get the crud out and lube the thing.. The pulley shuts up for about a half an hour and then starts up again.
Actually does not bother me off road but I rode a 30 mile rails to trails with the SO yesterday and it drove me nuts. Nothing like a 3.5K bike on rails to trails squeaking its way through at sub-sonic speeds :-(

BTW - where are you at in PA?
Where I rider
May 28, 2002 10:22 AM
I'm from Harrisburg PA area (mechanicsburg). I joined the one mtb club who's having a mtb bash this september.

Our club is called RCST website at

We're having state game land issues this year and will lose some of the games lands. KMBA is forming three regional officers, our IMBA rep can't handle the whole state anymore, in two weeks. So far we have 7 mtb clubs mtb clubs involved in this group. We're helping PGC designate what trails are open to mtb riding.

Our club maintains Weiser State forest and we now have over 30 miles of single track riding.

Hope to see you out on the trail some time.

me beJekyll
May 28, 2002 10:55 AM
In central PA - about 2 hours west of Harrisburg - lots on MTB riding around here and not much issue with closures (yet). Just visited your part of the world to buy a (gasp) car at Cumberland Valley Motors. Pretty scenery around there - looks like great riding but quite a bit flatter than here.
I belong to the club that ran/runs the Tour De Toona, now the International. Actually we are in the process of forming a club not affiliated with ABC and the race because of a plethora of legal issues and liability concerns. We be now the Blair Bicycle Club. I don't know if there is anything we can do to help with the fight KMBA/IMBA is waging in PA but I'm sure we would be more than willing to help. Drop me a line if you think we can help (

Disassemble and lubricate the bearing ...Markus_B
May 30, 2002 4:18 AM
by using a sharp knife to carefully remove the seal on one side. Lubricate the balls and press the seal back into its place.

I have done this several times with several "sealed bearing" pulleys (also those of RD-M952), because I usually have the problem that after a number of wet rides, they will not even turn around at all. I wonder if bushings may be better for pulleys.