SRAM Eagle Cracked Chain Plates

[DieselnDust]

If you run a 12 speed chain you are going to absolutely trash your cassette and chainring. They recommend you replace 12 speed chains at between 0.50% and 0.75% stretch.

 

 

 

Well thats depends on the cassette. If its a >48T then 0.5% wear is the replacement point. You can run it to 0.75% but then you're in for a new cassette as well.

<48 and 0.75% should be ok.

But remember the longer you run the chain to maximum life the shorter the life of the cassette so I always replace well before the chain is worn.

[Jehosefat]

You're missing what he's saying

 

No I'm not.

 

I'm not aware of any chain checkers that measure in "% of allowable stretch". On every chain checker I have ever seen, a measurement of 0.25 is 0.25% stretch and not "25% of allowable stretch" as he claimed. It would make no sense for it to measure "% of allowable stretch" since, as has been pointed out a few times, allowable stretch differs depending on drivetrain (e.g. 12x, 11x, max cog size etc.)

 

0.25% stretch is between 33% and 50% of "allowable" stretch.

Edited May 22, 2020 by Jehosefat

[DieselnDust]

No I'm not.

 

I'm not aware of any chain checkers that measure in "% of allowable stretch". On every chain checker I have ever seen, a measurement of 0.25 is 0.25% stretch and not "25% of allowable stretch" as he claimed. It would make no sense for it to measure "% of allowable stretch" since, as has been pointed out a few times, allowable stretch differs depending on drivetrain (e.g. 12x, 11x, max cog size etc.)

 

0.25% stretch is between 33% and 50% of "allowable" stretch.

 

 

....that depends on what allowance is making

[MTB-More]

Well thats depends on the cassette. If its a >48T then 0.5% wear is the replacement point. You can run it to 0.75% but then you're in for a new cassette as well.

<48 and 0.75% should be ok.

But remember the longer you run the chain to maximum life the shorter the life of the cassette so I always replace well before the chain is worn.

 

I go by the 1, 2, 4 rule (Some do 1,2,6)

 

1 Casette lasts 2 Chainrings and 4 chains. I swap the chains at 2000km marking them as 1,2,3,4 as they wear and on 4 go back to 1 to give it another 2000km life

 

That way you get around 16000km out of the Casette and 4 chains as they wear uniformly as you keep on swapping the chians.

Edited May 22, 2020 by MTB-More

[Longbarn Killer]

https://community.bikehub.co.za/topic/116861-boast-about-your-latest-purchases-here/?p=3663075

 

Another one

[boesman88]

https://community.bikehub.co.za/topic/116861-boast-about-your-latest-purchases-here/?p=3663075

 

Another one

 

????

[snutkin@gmail.com]

No, I mean 25%.

 

0.25 on chain checker tool = 25% of "allowable" stretch.

 

If you think 1% is " "allowable" stretch" on *any* chain, much less a 12 speed chain, good luck to you!

[Rigardt@Scott]

If you run a 12 speed chain you are going to absolutely trash your cassette and chainring. They recommend you replace 12 speed chains at between 0.50% and 0.75% stretch.

Read my post again.

[Rigardt@Scott]

If you think 1% is " "allowable" stretch" on *any* chain, much less a 12 speed chain, good luck to you!

Not what I said.

 

I tend to get 10,000km out of my Sram cassettes.

[snutkin@gmail.com]

Not what I said.

 

I tend to get 10,000km out of my Sram cassettes.

 

Chains don't stretch. They wear. And no, it's not the same thing. There's no such thing as "allowable stretch". So nobody knows what you actually really said. Including yourself.

 

I reckon you probably measure kms the way you measure chain wear. 

[Rigardt@Scott]

Chains don't stretch. They wear. And no, it's not the same thing. There's no such thing as "allowable stretch". So nobody knows what you actually really said. Including yourself.

 

I reckon you probably measure kms the way you measure chain wear.

Chains definitely do stretch, the also wear. Two seperate things. I know what I said, and I know how a chain checker works. I used the term "allowable" for lack of a better term, that's why it's in parentheses.

 

Lockdown seems to be getting to people. You're getting way too emotional over a comment made in a bike forum.

[Chadvdw67]

you must be the only person in the world to have such high wear from a XX1 chain.

What drivetrain is your bike fitted with?

Its a GX 11speed

[NotSoBigBen]

Chains definitely do stretch, the also wear. Two seperate things. I know what I said, and I know how a chain checker works. I used the term "allowable" for lack of a better term, that's why it's in parentheses.

 

Lockdown seems to be getting to people. You're getting way too emotional over a comment made in a bike forum.

If the 'Yellow Saddle' was still here I'd be preparing buckets of popcorn about now...

[rouxtjie]

If the 'Yellow Saddle' was still here I'd be preparing buckets of popcorn about now...

koot, can you imagine

[Starvin' Marvin]

Its the GX.  

It must be material failure. I ride GX, I clean my chain maybe once a week, maybe. I have done 1400km on this chain, still within spec. 

[Rigardt@Scott]

If the 'Yellow Saddle' was still here I'd be preparing buckets of popcorn about now...

 

Ok, let me explain…. 

 

I am not disputing that a chain tool measures chain stretch as a percentage of overall chain length, and I am not disputing that it is 0,25%, 0.5%, and 0,75%.

 

Some context…. A while back I was going through GX Eagle chains very quickly, and some people on the hub were making big claims about the life span of XX1 chains. I decided to try that, and for curiosity’s sake I wanted to measure how the chain was stretching accurately. So here is what I did, which should explain my initial post a bit better.

 

I replace my chains at 0.75% - that is my “allowable” amount of stretch. To measure I take a vernier calliper, and measure the length from the inside of a roller to the inside of another roller with 10 links in between. For the sake of my explanation let’s say that measurement is 100mm on a new and unused chain. I then took a chain at 0,75% wear and took the same measurement, let’s say for this explanation that this measurement was 110mm, thus giving me an allowable stretch of 10mm. So, if the measurement reads 102,5mm that means I am at 25% of allowable stretch. When it gets to 110mm I am at 100% of allowable stretch, and it is time to replace. Again, I am just using these numbers to explain the concept.

 

As I used my new XX1 chain I take this measurement often, after a considerable amount of km, I am not even at 25% of allowable stretch.

 

Hopefully that clears it up?

 

On the stretch/wear thing. Chains can wear (degradation of the material) and stretch. Bicycle chains generally speaking stretch before the material degrades, and that’s why we measure stretch.

 

Okes really need to relax, this isn’t a foreign policy or religious rights debate. We’re talking about chains.