Cassette & Six Chains

[Marchrider]

I thought I would share my mad data
Basically I have used 6 chains on this cassette, I took all 6 out to around 0.6% and now I am going throgh them all again taking them out to 1.4%
If I get all out to 1.4% I will see if I can get them out to 2%

So Chain 2, is a Yaban (Taiwan) ran this chain from Apr 23 to July 23 and covered 1500 miles. This chain was them used again from Aug 24 to Oct 24 and covered another 1380 miles taking the total for this chain up to 2880 miles

 

[Ajax Bay]

Great data! I'd procure replacement chain rings so that you have them ready when needed.
Like the way you used Chain 6 out to 1.4% before reaching back to Chain 1.
How are you measuring the % extension accurately?
The difference you've found between the three Yabans and the two KMCs is stark.

 

[Drago]

The long winter nights...

 

[Marchrider]

Great data! I'd procure replacement chain rings so that you have them ready when needed.
Like the way you used Chain 6 out to 1.4% before reaching back to Chain 1.
How are you measuring the % extension accurately?
The difference you've found between the three Yabans and the two KMCs is stark.

I buy my chains on Ebay and don't thing I have ever paid more than £6 - the KMC ones could be fake, they all might be fake? but the YBN ones always last well, the pins must be a better quality, harder or something - I am still trying to source some for my next cassette.

I measure the full length, all 54 links
I have a set peg in the garage with a bit of old steel ruler glued in place

I need to add 1200mm to that so
54 links = 1389.9 / (54 * 25.4) = 1.33%
lots of inaccuracies in measuring worn chains, dirt on the rollers will be making that look shorter! if i thoroughly wash that chain, it could be 2 or 3 mm longer!
also heat expansion, the MDF borad expands greater than the steel, 10°C could produce a further 0.04%

anyway I better go and have my medication

 

[gbb]

The long winter nights...

It's surprising, even to oneself at the time, how anal you can get.i used to easily get 3 chains to a cassette, changed it after the fourth was worn out.
Mileages, chains used, lubing regime used, cleaning, it gets a bit all encompassing when the mood takes you.
Now ( or for a long time since), can't be bothered with the faff anymore, the moment has gone.
Fair do's to OP , that's impressive.

 

[Drago]

Yeah, I poke fun but that's some serious commitment to ekasurement and record keeping there. I simply replaced the cassette every 3rd chain.

 

[Marchrider]

Yeah, I poke fun but that's some serious commitment to ekasurement and record keeping there. I simply replaced the cassette every 3rd chain.

I do as well, it is an odd thing that I can't explain - I've always compiled useless data

 

[Ajax Bay]

lots of inaccuracies

Maybe, but very small inaccuracies, which may cancel one another out.
My one suggestion is to have a weight on a hook which you use to ensure an assured specific tension by hooking on before measuring.
Hope medication was tasty: mine was (actually I can't remember whether it was or not).
Goes looking for YBN:
https://www.bikeradar.com/reviews/c...ins/yaban-ybn-heavy-duty-9-speed-chain-review

 

[presta]

I thought I would share my mad data
Basically I have used 6 chains on this cassette, I took all 6 out to around 0.6% and now I am going throgh them all again taking them out to 1.4%
If I get all out to 1.4% I will see if I can get them out to 2%

View attachment 764747

So Chain 2, is a Yaban (Taiwan) ran this chain from Apr 23 to July 23 and covered 1500 miles. This chain was them used again from Aug 24 to Oct 24 and covered another 1380 miles taking the total for this chain up to 2880 miles

What's the objective?

 

[Pat "5mph"]

What's the objective?

Same thing as me making 6 different recipes of chocolate cake, then recording how moist and fluffy each one is
or even:
me planting 6 seedlings in different locations, then recording which one did better.

 

[Juan Kog]

My initial thoughts you need to get out more, but checking the figures you get out a lot .

 

[Sea of vapours]

Great set of data. The differences in chain life across brands are interesting. Also interesting is how remarkably low the mileage on all of them is up to your 0.6-ish % wear point !

 

[Marchrider]

What's the objective?

I quite like spread sheets...

I done the same with the last cassette, as I was curious with the wear relationship between the chain and the cassette, chains seem to wear out more quickly and when the chain becomes too long the chain damages the teeth on the cassette and then they both become useless, and as we all know once wear gets past a certain point a new chain will just slip on an old cog

So I was curious if I wore down a number of chains sympathetically with the cassette, (try to get the cassette to wear down at the same rate as the chains). How far would I get, as in how much could a chain be stretched

I did get one chain out to 2.45% before it started to slip - but my whole experiment turned into an utter disaster when I lost the 5 other chains, it still puzzles me how I achieved that, I must have binned them off! - what a disaster, 18,000 miles of chain wearing and I misplaced them all

So I'm giving it all another go, see if I can get beyond 2.5% (I'm being extra careful not to loose them this time)

Great set of data. The differences in chain life across brands are interesting. Also interesting is how remarkably low the mileage on all of them is up to your 0.6-ish % wear point !

I think I have always worn chains out faster than others do - may be its cheap chains off ebay, poor maintenance ( I ride all winter and strugglre to be bothered doing maintenance in a cold garage after spend hours on the road) may be its all the hills or maybe my engines are too powerful (its definitely not that - lol) .
2000+ miles for a £5 chain seem reasonable (¼p a mile), I don't use the correct oils but if I did I would probably pend more on the oil that the chain

 

[Sea of vapours]

I think I have always worn chains out faster than others do - may be its cheap chains off ebay, poor maintenance ( I ride all winter and strugglre to be bothered doing maintenance in a cold garage after spend hours on the road) may be its all the hills or maybe my engines are too powerful (its definitely not that - lol) .
2000+ miles for a £5 chain seem reasonable (¼p a mile), I don't use the correct oils but if I did I would probably pend more on the oil that the chain

Cost-wise, that dos seem pretty cheap, yes! From purely academic interest, that difference does show what maintenance can do though. I also ride all winter and used to get 4-5,000 miles from a chain up to 0.5% wear. With waxing, that's now about 10,000 miles, but both with more maintenance than you're doing, so my rate of pay on the maintenance will be pretty low on that basis ;-)

 

[Ajax Bay]

@Yellow Saddle view/comment?