#1
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new chain, slack
It seems after putting on a new chain, it turns
really slack after only 2-3 weeks. When you then restraighten it, it remains tight considerably longer. Is this so or does intuition play a trick on me? In general, how many bike hours does a chain last? -- underground experts united http://user.it.uu.se/~embe8573 |
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#2
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new chain, slack
On Sun, 17 Dec 2017 22:43:17 +0100, Emanuel Berg
wrote: It seems after putting on a new chain, it turns really slack after only 2-3 weeks. When you then restraighten it, it remains tight considerably longer. Is this so or does intuition play a trick on me? In general, how many bike hours does a chain last? That's sort of asking "how long is a piece of string" :-) Bike chain, how many speeds, runs inside a chain case, how fast, how much power transferred, new cogs or old, lubricated, how frequently, etc., etc. -- Cheers, John B. |
#3
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new chain, slack
John B. wrote:
That's sort of asking "how long is a piece of string" :-) Actually, that was to be my very next question Bike chain, how many speeds, runs inside a chain case, how fast, how much power transferred, new cogs or old, lubricated, how frequently, etc., etc. OK, then let's assume a single speed bike, either Torpedo or Shimano. It does have a chain guard. Speed doesn't exceed 25 km/h. The person cycling weights in at 80 kg. The chainwheel and sprocket are 10-15 years old. The chain is lubricated one a month. -- underground experts united http://user.it.uu.se/~embe8573 |
#4
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new chain, slack
Bike chain, how many speeds, runs inside
a chain case, how fast, how much power transferred, new cogs or old, lubricated, how frequently, etc., etc. OK, then let's assume a single speed bike, either Torpedo or Shimano. It does have a chain guard. Speed doesn't exceed 25 km/h. The person cycling weights in at 80 kg. The chainwheel and sprocket are 10-15 years old. The chain is lubricated one a month. Oh yeah, the chain is the Shimano CN-NX10 1S chain which is 1/2*1/8. (silence) "Good specifications, Manny. In that case, I don't know" -- underground experts united http://user.it.uu.se/~embe8573 |
#5
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new chain, slack
On Mon, 18 Dec 2017 03:24:03 +0100, Emanuel Berg
wrote: John B. wrote: That's sort of asking "how long is a piece of string" :-) Actually, that was to be my very next question Bike chain, how many speeds, runs inside a chain case, how fast, how much power transferred, new cogs or old, lubricated, how frequently, etc., etc. OK, then let's assume a single speed bike, either Torpedo or Shimano. It does have a chain guard. Speed doesn't exceed 25 km/h. The person cycling weights in at 80 kg. The chainwheel and sprocket are 10-15 years old. The chain is lubricated one a month. One of the "etc's" has to be "and how far do you ride in a normal year, Sir?" -- Cheers, John B. |
#6
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new chain, slack
On 17/12/17 22:43, Emanuel Berg wrote:
It seems after putting on a new chain, it turns really slack after only 2-3 weeks. When you then restraighten it, it remains tight considerably longer. Is this so or does intuition play a trick on me? In general, how many bike hours does a chain last? Fully enclosed hub/ss setup seem to last forever. My old dérailleur setup was a chain a year/ about 2,000kms. The current setup, with hub/open chain guard looks to be 3x that so far. One more year to make. |
#7
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new chain, slack
John B. wrote:
One of the "etc's" has to be "and how far do you ride in a normal year, Sir?" Wait, isn't that a function of the answer to *my* question (how many bike hours does a chain last) and the speed data? Obviously the average speed of urban cycling isn't 25 km/h. It is rather 15 or 10 km/h. Let's say 15 km/h to make the experiment more "fit" So now the data is: - A single speed bike, either Torpedo or Shimano. - It does have a chain guard. - The chain is the Shimano CN-NX10 1S which is 1/2*1/8. - Speed doesn't exceed 25 km/h; average speed is 15 km/h. - The person cycling weights in at 80 kg. - The chainwheel and sprocket are 10-15 years old. - The chain is lubricated one a month. -- underground experts united http://user.it.uu.se/~embe8573 |
#8
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new chain, slack
Another issue is - when does chain wear occur?
Is it when pedalling forward or is it when starting and stopping, including the foot/coaster brake? Here we assume "normal" usage -- underground experts united http://user.it.uu.se/~embe8573 |
#9
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new chain, slack
The rear axle, chain positioning at istallation was incorrect.
Riding over sand with factory lube wudnot produce slack for miles |
#10
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new chain, slack
avagadro wrote:
The rear axle, chain positioning at istallation was incorrect. Well, of course it is, in the platonic sense, and the chainring/sprocket - more so the chainring, right? - could be crooked to some degree. Still, should be a minor error, right I've had this problem with professional guys doing it, which isn't to say professional guys cannot make mistakes. But anyway then he blamed the new chain, and yes, I've seen this on "my" bikes as well, onto which I always put a new chain, so I'll not make any categoric claims at this point... Riding over sand with factory lube wudnot produce slack for miles Not even if you start and stop? N.B. coaster brake. -- underground experts united http://user.it.uu.se/~embe8573 |
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