Chain suck: Worn Ring?

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philkeeble
Posts: 75
Joined: Tue Sep 14, 2004 19:28 pm

Chain suck: Worn Ring?

Postby philkeeble » Tue Jul 09, 2019 13:47 pm

My Hewitt Cheviot SE touring bike has done around 9,000 miles. Chains have been renewed religiously at 0.75% wear. Chainset and cassette are original. Lately, when changing up from the little ring, I have experienced chain suck on the middle ring rather too frequently.
Is this a sign that it’s time to replace my middle ring?

Thanks
Phil
Cheers,
Phil, in Inverurie

lemonenema
Posts: 164
Joined: Mon Jan 07, 2019 15:24 pm

Re: Chain suck: Worn Ring?

Postby lemonenema » Tue Jul 09, 2019 18:36 pm

sounds like it, take it off give it a wipe over (wd-40, gt85 etc on a cloth work wonders) and see if the teeth are hook shaped, but it does seem likely

david7m
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Re: Chain suck: Worn Ring?

Postby david7m » Tue Jul 09, 2019 20:42 pm

I'm impressed with 9k on one cassette!
I have this feeling that starting to mix new bits with old is going to create more problems - just based on my experiences:)

thecycleclinic
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Re: Chain suck: Worn Ring?

Postby thecycleclinic » Tue Jul 09, 2019 23:16 pm

0.75% wear is too much for a chain. If I leave a chain that long I normally have trashed the cassette. You would get long chainring life and even longer cassette life, changing the chain at 0.5% wear. I should practice what I preach I just pulled of a chain of the audax bike that had 1% wear and a cassette so trashed none of it could be reused.

chain suck is a sure sign of trashed rings.
http://www.thecycleclinic.co.uk -wheel building and other stuff.

awavey
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Re: Chain suck: Worn Ring?

Postby awavey » Tue Jul 09, 2019 23:42 pm

david7m wrote:I'm impressed with 9k on one cassette!
I have this feeling that starting to mix new bits with old is going to create more problems - just based on my experiences:)


well I think thats just bikes in general, you fix one bit and pardon the pun the next weakest link in the chain, literally, then becomes the next problem issue, its whether continuing to replace bits in that fashion is then cost effective.

certainly my bike is probably not worth more than a replacement groupset and rear hub (as thats on the way out too) would cost in at now.

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Alejandrosdog
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Re: Chain suck: Worn Ring?

Postby Alejandrosdog » Fri Jul 12, 2019 07:13 am

thecycleclinic wrote:0.75% wear is too much for a chain. If I leave a chain that long I normally have trashed the cassette. You would get long chainring life and even longer cassette life, changing the chain at 0.5% wear. I should practice what I preach I just pulled of a chain of the audax bike that had 1% wear and a cassette so trashed none of it could be reused.

chain suck is a sure sign of trashed rings.


.75 is the accepted optimal point to change 10 speed and lower chains.

.5 for 11 speed.

philkeeble
Posts: 75
Joined: Tue Sep 14, 2004 19:28 pm

Re: Chain suck: Worn Ring?

Postby philkeeble » Fri Jul 12, 2019 08:53 am

Thanks for all replies. My chain checkers (both brands) only have 0.75 and 0.1% wear indicators. Not seen one that has 0.5%. Bike in question is a 9-speed. New chain rings now on order. I've ordered two because a) my wife has same bike and has only a few less miles on it than me and b) because 9-speed chain rings are rapidly becoming scarce!
Cheers,

Phil, in Inverurie

lemonenema
Posts: 164
Joined: Mon Jan 07, 2019 15:24 pm

Re: Chain suck: Worn Ring?

Postby lemonenema » Sat Jul 13, 2019 23:42 pm

Well here's news for you... You don't have to use 9 spd chainrings! My MTB has a 9spd cassette and 10/11spd narrow-wide single, and my road bike has an 11spd double crankset with a 9 spd cassette, with a 10spd chain! I had to get an 11spd front derailleur but still on standard shifters

Happy fettling!

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Alejandrosdog
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Re: Chain suck: Worn Ring?

Postby Alejandrosdog » Sun Jul 14, 2019 12:19 pm

philkeeble wrote:Thanks for all replies. My chain checkers (both brands) only have 0.75 and 0.1% wear indicators. Not seen one that has 0.5%. Bike in question is a 9-speed. New chain rings now on order. I've ordered two because a) my wife has same bike and has only a few less miles on it than me and b) because 9-speed chain rings are rapidly becoming scarce!

Nice, ive got some 9 speed chainrings my wife is still on her dura ace triple from over a decade ago and pre children. It’s good stuff.

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Dabber
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Re: Chain suck: Worn Ring?

Postby Dabber » Sun Jul 14, 2019 14:19 pm

philkeeble wrote:Thanks for all replies. My chain checkers (both brands) only have 0.75 and 0.1% wear indicators. Not seen one that has 0.5%. Bike in question is a 9-speed. New chain rings now on order. I've ordered two because a) my wife has same bike and has only a few less miles on it than me and b) because 9-speed chain rings are rapidly becoming scarce!


The Park Tool Chain Checker CC-3.2 has 0.75 and 0.5
https://www.parktool.com/product/chain-wear-indicator-cc-3-2
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