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Old 09-27-09, 12:00 PM   #1
lineinthewater
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Freehub periodic noise (possible rubbing) - worth investigating further?

So ever since I've had my current road bike, the rear wheel has made a slight rubbing/off noise periodically while free spinning. It is barely noticeable. Now that I'm finally maintaining my own bike, I determined that the noise seems to be coming from the freehub - more noticeable when the freehub is attached to the wheel. The LBS mechanic told me to squirt some tri-flow into the freehub and spin it up. This seemed to help out a little, but it is still there. I'm guessing tri-flow wasn't the ideal lube since it is pretty thin - but it's not like you can squirt grease into the freehub. I have no idea how to service a freehub - but would be willing to learn if necessary (and if possible). The mechanic seemed to indicate it wasn't a big deal - had no impact on performance. Should I just leave as-is?

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Old 09-28-09, 01:55 PM   #2
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Just leave it. You really don't want to go into a freehub if you can avoid it.
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Old 09-28-09, 02:03 PM   #3
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You sure you arent getting rub from brake pads or somewhere else?

If it is the hub I'd leave it, bikes make noise, even the really good ones.
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Old 09-28-09, 02:21 PM   #4
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Quote:
Originally Posted by sooprvylyn View Post
You sure you arent getting rub from brake pads or somewhere else?
Positive. When I pull the wheel off and spin it holding the cassette, I can hear the same noise.

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If it is the hub I'd leave it, bikes make noise, even the really good ones.
So that is two votes for "leave it alone". Sounds good to me.
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Old 11-18-09, 04:38 AM   #5
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free hub noise

When the pawls in the freehub do not completely engage, they slip against the freehub body and make a popping/creaking sound. A terrible sound actually. Freehub bodies are usually replaceable as a unit.
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Old 11-18-09, 05:06 AM   #6
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Do you have a plastic spoke protector in place behind the cassette?
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Old 11-18-09, 08:50 AM   #7
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spacer

one millimeter spacer goes on before cassette on free hub body. My sound is from the free hub body - no doubt. In fact, bontrager acknowledges that they produced a batch of unreliable free hubs.
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Old 11-18-09, 11:03 AM   #8
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If you want to service the freehub, remove it, pop out the seal, and run solvent through it. Dry it and use a heavy oil to relube it.
shimano used to make a tool to take apart their freehubs. Based on a Zinn article I bought one and replace the spring in my freehubs with a heavier one made from piano wire so I could pump grease through them. I use this tool to pump in a light grease every other overhaul. http://www.loosescrews.com/index.cgi...d=453593013705
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