Negative chain stretch?
#1
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Negative chain stretch?
My current chain seems to maintaining a negative chain stretch of less than 1/16 inch. The chain is correctly tensioned by the rear derailleur (does not sag a bit) and I'm using Stanley branded rule. I even used no-brand made in China rule and gave me the same measurement.
I measured it upon installation from the box and did have negative stretch back then but now, over 1000 miles later, it still had negative stretch. In fact, the amount of stretch did not seem to change at all.
No chain skipping, no issues, no problems just thought it seems weird because the Parktool channel in YT did not mention anything of that sort.
I measured it upon installation from the box and did have negative stretch back then but now, over 1000 miles later, it still had negative stretch. In fact, the amount of stretch did not seem to change at all.
No chain skipping, no issues, no problems just thought it seems weird because the Parktool channel in YT did not mention anything of that sort.
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The is why you don’t put chains in the dryer.
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What is your chain cleaning lubrication schedule? You probably just aren't wearing it out as it is well lubricated.
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We're talking about shrinkage, right?
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Your posts have negative value, too. So, they have something in common with your chain.
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Spring is always a very strange season here on teh Biek Forms, but this spring has seemed especially odd here in 'General'. Strange threads popping up all over the place; one could be forgiven for thinking that we have been teleported to a
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#11
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Currently, the chain looks out-of-the-box clean. But the chainring and cassette teeth are covered by very thin film of dry and very fine black soot. This soot has formed a hard and dry compacted layer at the chainring tooth in contact with the chain rollers. This soot is mostly absent on the chain, making the chain look clean. Only present in the contact surface between the inner and outer plates, hardly noticeable unless you take a very close look.
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I’ve often wondered if backpedaling counteracts the typical stretch/wear that occurs during normal riding.
Can enough backpedaling return a chain to its original state?
Personally I doubt it does so maybe that just means I’m backpeddling.
John
Can enough backpedaling return a chain to its original state?
Personally I doubt it does so maybe that just means I’m backpeddling.
John
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Negative stretch almost always results from a combination on non-synthetic motor oil and too much coasting. I forget which book I read that in. That is often accompanied by an insufficient amount of guadpower.
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Obviously, nanobots are adding metal to the chain.
You're measuring wrong. No one here is going to figure out how and it's not causing any problems, so let it go.
You're measuring wrong. No one here is going to figure out how and it's not causing any problems, so let it go.
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#18
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Sounds like a case of improper measurement. Chains are made accurately enough that you should never be able to see any length difference over 12 inches, with a new chain. Place one end of the rule on the edge of a pin. The pin at the other end should be completely covered when new. After some use, the covered pin exposure increases. I have a full length measurement setup that can show small differences over 54-55 inches. Campy chains are extremely consistent. The new sram axs chains, not as consistent. I've used a Campy chain for 6,000 miles and measured very little elongation over the full length, but the roller wear was huge and the side clearances were twice that of a new chain. When a second chain was installed on the cassette, there was new-chain skip. Don't rely only on checks of elongation. Some sram axs users are reporting similar extremely low elongation, but those users will get new-chain skip too. I alternate the use of 4 chains and will never get new-chain skip.
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Until it didn't.
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#24
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