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Freewheel w/ worn teeth

Old 08-06-21, 03:35 PM
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mijome07
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Freewheel w/ worn teeth

Hello. This 6 speed freewheel is from an 80s wheel set off a Specialized MTB. Will these worn teeth affect shifting? I wanna know before I clean it up and repack the bearings. Thanks.
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Old 08-06-21, 03:43 PM
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Unsure about shifting but the teeth are well worn and 2 look to have cracked off their tips. (Unless these are specific "short teeth", as in a shift gate. I would have expected to see other pairs on the other cogs if this was the case). I would expect possible chain meshing (as in skipping) issues with a new chain.

But the real answer is easy to find out by trying the freewheel before doing the clean and grease (which, BTW, is not recommended as the grease can cause the pawls to hang up). I would suggest simple flushing then dripping heavy oil through it. Andy
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Old 08-06-21, 04:07 PM
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Thank you Andy for the information. I appreciate it
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Old 08-06-21, 05:17 PM
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This freewheel looks like it would give ya a skip if you hit it just at that those missing teeth. Most likely it would not happen often.

I am in the process of taking apart several Shimano freewheels to clean and sort them out. They are 6 speeds with a 34T bailout gear and have become hard to find. I was very surprised to find out how much mud like residue was inside the freewheels. I cleaned them with petrol and found allot of silvery dust like residue that most likely came form the bearings.

If a new freewheel is easy to find I would consider retiring this one.

Originally Posted by Andrew R Stewart View Post
...I would suggest simple flushing then dripping heavy oil through it. Andy
Yep... Unless your going to take the freewheel completely apart I have used generic WD40 and just sprayed the inner edge of the freewheel till the solvent loosened everything up inside and then sprayed grease in from the out side lightly. Red & Redi is good for that.


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Old 08-06-21, 07:02 PM
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Before you do anything, see how expensive a replacement freewheel is. Look for the 6-speed Sunrace models on eBay. I prefer the all-chrome ones, but those are getting hard to find.
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Old 08-07-21, 03:37 AM
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It is rare that a chain skips on the largest sprocket.

Your photo doesn't clearly show the smallest sprocket (6th sprocket) which is the one most likely to skip.

Nonetheless, I think you'll most likely be fine.

Modern freewheels do shift a bit nicer than the old ones, but I believe also wear quicker.
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Old 08-07-21, 11:27 AM
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Aside from the condition, I lay a freewheel flat and then drip some phil's tenacious oil and let it sit and seep
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