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This chain needs replacing, yes?

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This chain needs replacing, yes?

Old 10-21-13, 08:08 AM
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PatrickGSR94
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This chain needs replacing, yes?

Was cleaning my bike Saturday and threw my metal square/straightedge on the chain - looks like it's stretched out nearly 1/8" or over 1%. Time to replace? It's a 105 10-speed chain with over 2,300 miles on it currently.

Also the chain seems very loose around the big chain ring, with noticeable openings between the rollers and the valleys between teeth.

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Old 10-21-13, 08:21 AM
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Clean it first. Dry, then hang it up to measure.

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Old 10-21-13, 08:24 AM
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It looks worn out, from the ruler measurement.
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Old 10-21-13, 09:42 AM
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Just ordered a KMC X10L chain. Hopefully it will last longer than this one.
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Old 10-21-13, 09:56 AM
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Looks more like 1/16" to me (1/2-1/4-1/8-1/16), so your cassette may be fine. You using wax on that thing?
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Old 10-21-13, 09:59 AM
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Definitely more than 1/16", more like 3/32" if it's less than 1/8".

Was using White Lightning, yes, because it's readily available to me without having to make a 25-mile round trip to the LBS for something else. But will now be researching other options. I'll probably use what comes in the chain for awhile at first.
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Old 10-21-13, 10:42 AM
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I just had a thought -- are you trying to eyeball where the chain pin is, past the end of your ruler? It'll be hard to get an accurate reading that way, so it's better to back up an inch (which is what I did) or buy a longer ruler.
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Old 10-21-13, 12:24 PM
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Originally Posted by PatrickGSR94 View Post
Definitely more than 1/16", more like 3/32" if it's less than 1/8".

Was using White Lightning, yes, because it's readily available to me without having to make a 25-mile round trip to the LBS for something else. But will now be researching other options. I'll probably use what comes in the chain for awhile at first.
I mix 1 part chain saw bar oil from Ace Hardware to 4 parts mineral spirits for chain lube. You need to remove and clean the chain to maximize the life of it and the rest of the drive train.
http://www.sheldonbrown.com/brandt/chain-care.html
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Old 10-21-13, 12:54 PM
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That chain looks to be toast.

+1 on the longer ruler suggestion. 15"ers aren't too tough to come by, or just get a Park spoke ruler, they're 12 1/4" IIRC, but blue color kinda hard to read with these old eyes.

I like to measure from edge of pin, personally
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Old 10-21-13, 01:15 PM
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Originally Posted by davidad View Post
I mix 1 part chain saw bar oil from Ace Hardware to 4 parts mineral spirits for chain lube. You need to remove and clean the chain to maximize the life of it and the rest of the drive train.
http://www.sheldonbrown.com/brandt/chain-care.html
Since my new chain will have the KMC Missing Link on it, I will be able to easily remove it regularly.

Do you typically remove the chain, clean it, put it back on, then apply your home-brew lube? Does your lube make the chain super-greasy such that it blackens anything that gets near it?
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Old 10-21-13, 02:48 PM
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Lot's of 18" machinist's steel rules available. That's what I use. Line up one pin centered on 1" and look at the pin at 13". Best to avoid the ends of a ruler.

Agree. It looks like 1/16" to me. Look at the pin just past the 1" mark. The pin off the end will be 12/11 more than that.
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Old 10-21-13, 03:04 PM
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Originally Posted by PatrickGSR94 View Post
Since my new chain will have the KMC Missing Link on it, I will be able to easily remove it regularly.

Do you typically remove the chain, clean it, put it back on, then apply your home-brew lube? Does your lube make the chain super-greasy such that it blackens anything that gets near it?
Every 750 to 800 miles I drop it in an ultrasonic cleaner, rinse, and dry it. I put it back on the bike then relube the chain.
The black is from wear material inside the chain. If it is a problem for you wipe it off after you ride.
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Old 10-21-13, 04:13 PM
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Originally Posted by 10 Wheels View Post
Clean it first. Dry, then hang it up to measure.
Why bother cleaning when his measurement already shows at least 1/16" of wear? If it's just going in the trash (or recycling) it may as well go in dirty.
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Old 10-21-13, 04:16 PM
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Originally Posted by prathmann View Post
Why bother cleaning when his measurement already shows at least 1/16" of wear? If it's just going in the trash (or recycling) it may as well go in dirty.
More accurate with the dirt gone.

I use um up to 1/4 stretch.
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Old 10-21-13, 04:38 PM
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Originally Posted by 10 Wheels View Post
More accurate with the dirt gone.

I use um up to 1/4 stretch.
Removing dirt that's filling some space between links could make the chain look longer, but it isn't going to cause it to shrink. So if the pre-cleaning measurement is already at an individual's wear limit there's no need to go ahead with the trouble of cleaning it. Using the chain until there's 1/4" of wear over 12" (> 2% elongation) seems inadvisable unless you're already planning on replacing the cassette as well.
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Old 10-21-13, 04:40 PM
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1/4"? Oh my!
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Old 10-21-13, 04:42 PM
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Originally Posted by LesterOfPuppets View Post
1/4"? Oh my!
All of my miles are on flat roads. Most days I never shift gears.
6 years now never worn out a cassette.
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Old 10-28-13, 09:01 AM
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Once a chain gets to 1/16" stretch over 12 lengths we recommend replacement. Past this point (it may have already) excessive drivetrain wear occurs, usually amounting to additional costly replacement of cassettes and chain rings. Be sure to wipe down the chain after each lube. This will help remove any build-up while the lube is still runny, and also minimize the amount of lube left externally to act as an attractant to dirt and grime. As for lubricant, we use Boeshield T-9 exclusively here at our shop in the desert SW.
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Old 11-04-13, 10:37 PM
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Put on the new chain, they were supposed to send me silver but sent the gold Ti coated one. Oh well I kinda like it.

The old chain with 108 links should have been 54" long, but had stretched out to 54.5"

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Old 11-04-13, 10:47 PM
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Your cassette looks good.
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Old 11-04-13, 10:48 PM
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Originally Posted by GeneO View Post
Your cassette looks good.
It should, new Ultegra 6700 11-28
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