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PostPosted: Tue Sep 22, 2020 8:24 pm 
Devout Dirtbag

Joined: Fri Oct 12, 2018 6:28 pm
Posts: 147
Anyone use a sprocket wear checker or do you have another way to check for wear?
Like this or could you use a cut down chain whip.
https://uniortools.com/eng/product/1658 ... -indicator


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PostPosted: Wed Sep 23, 2020 4:49 am 
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Joined: Thu Apr 30, 2009 9:47 pm
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Location: Newbury, Berkshire
I've got the Rohloff Sprocket Wear Indicator tool, which is really good. I've never been able to establish a worn cassette very well just by looking at the teeth, so this tool is a real boon.

I guess you may be able to use a "cut down chain whip" and get some sort of result, but I would just buy the correct tool for the job.

Pip


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PostPosted: Sun Sep 27, 2020 9:52 pm 
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Joined: Wed Apr 13, 2011 11:11 pm
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Location: Nottinghamshire
Generally with experience you can tell my eye looking at the tooth profile, you could also wrap a sectoion of quality new chain around the sprocket and see how much lift you can get with a pick by lifting the center of the section away from the teeth - you shouldn't be able to lift it much.


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PostPosted: Mon Sep 28, 2020 9:37 pm 
Retro Guru

Joined: Tue Oct 23, 2012 10:52 am
Posts: 582
Location: Whelmington on Sea
Select which gear is suspect, apply the brake, & apply force to the crank whilst watching for the chain riding up the teeth on the sprocket. If it rides up it's replacement time.


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PostPosted: Mon Sep 28, 2020 10:58 pm 
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Joined: Mon Jun 19, 2017 7:01 pm
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Location: N.E.England
Interesting. I also struggle to see the wear. I know bigger cogs are less prone to wear but why wouldn't it work on cogs over 21T?


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PostPosted: Tue Sep 29, 2020 10:41 am 
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Joined: Thu Jun 23, 2011 11:25 pm
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Location: It's not easy being a dolphin.
Didn't even know such a tool was made.

I normally try to remember how many chains the sprocket has done, and if in doubt just visually compare the (old) with a new.


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PostPosted: Tue Sep 29, 2020 12:19 pm 
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Joined: Mon Jun 19, 2017 7:01 pm
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Location: N.E.England
iscervo wrote:
Select which gear is suspect, apply the brake, & apply force to the crank whilst watching for the chain riding up the teeth on the sprocket. If it rides up it's replacement time.


Just saw a demo of that on youtube - great tip!


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PostPosted: Tue Sep 29, 2020 1:02 pm 
Dirt Disciple
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Joined: Fri Nov 14, 2014 1:44 am
Posts: 34
Location: South Wales, Tofaen
I have Rohloff Sprocket Wear Indicator tool used it a few times over the years. Unior and KMC make them too.


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